https://scholafly.com/ https://scholafly.com/teachers/ https://scholafly.com/privacy/ https://scholafly.com/maths/ https://scholafly.com/maths/aqa-8300/ https://scholafly.com/teachers/maths/aqa-8300/ https://scholafly.com/maths/edexcel-1ma1/ https://scholafly.com/teachers/maths/edexcel-1ma1/ https://scholafly.com/maths/eduqas-c300/ https://scholafly.com/teachers/maths/eduqas-c300/ https://scholafly.com/maths/ocr-j560/ https://scholafly.com/teachers/maths/ocr-j560/ https://scholafly.com/maths/caie-0580/ https://scholafly.com/teachers/maths/caie-0580/ https://scholafly.com/maths/edexcel-4ma1/ https://scholafly.com/teachers/maths/edexcel-4ma1/ https://scholafly.com/computer-science/ https://scholafly.com/computer-science/aqa-8525/ https://scholafly.com/teachers/computer-science/aqa-8525/ https://scholafly.com/computer-science/edexcel-1cp2/ https://scholafly.com/teachers/computer-science/edexcel-1cp2/ https://scholafly.com/computer-science/ocr-j277/ https://scholafly.com/teachers/computer-science/ocr-j277/ https://scholafly.com/physics/ https://scholafly.com/physics/aqa-8463/ https://scholafly.com/teachers/physics/aqa-8463/ https://scholafly.com/physics/edexcel-1ph0/ https://scholafly.com/teachers/physics/edexcel-1ph0/ https://scholafly.com/physics/ocr-j249/ https://scholafly.com/teachers/physics/ocr-j249/ https://scholafly.com/lesson/cs01-00/2026-08-27https://scholafly.com/assets/thumbs/cs01-00.jpgChapter intro: Binary and number basesIn this video you'll learn about binary and number bases for GCSE Computer Science. For: AQA, Edexcel, OCR GCSE Computer Sciencehttps://www.youtube.com/embed/FhBTIBfALl01722026-08-27T00:49:39+01:00yes https://scholafly.com/lesson/cs01-01/2026-08-27https://scholafly.com/assets/thumbs/cs01-01.jpgWhy computers use binaryIn this video you'll learn about why computers use binary for GCSE Computer Science, with worked examples and the mistakes examiners report. By the end you'll be able to explain the decimal, binary and hexadecimal number bases, and explain why a computer represents all data and instructions in binary.https://www.youtube.com/embed/u_E79oQc3vg6602026-08-27T02:19:09+01:00yes https://scholafly.com/lesson/cs01-02/2026-08-27https://scholafly.com/assets/thumbs/cs01-02.jpgDenary to binary and backIn this video you'll learn about denary to binary and back for GCSE Computer Science.https://www.youtube.com/embed/8BNbDYvaatg8682026-08-27T02:46:07+01:00yes https://scholafly.com/lesson/cs01-03/2026-08-26https://scholafly.com/assets/thumbs/cs01-03.jpgWhy hexadecimal existsIn this video you'll learn about why hexadecimal exists for GCSE Computer Science.https://www.youtube.com/embed/3xFsSpMReow7592026-08-26T22:16:48+01:00yes https://scholafly.com/lesson/cs01-04/2026-08-26https://scholafly.com/assets/thumbs/cs01-04.jpgDenary and hexadecimalIn this video you'll learn about denary and hexadecimal for GCSE Computer Science, with worked examples and the mistakes examiners report. By the end you'll be able to convert between denary and hexadecimal in both directions for values 0 to 255.https://www.youtube.com/embed/UYWEpHOGYz07592026-08-26T22:18:14+01:00yes https://scholafly.com/lesson/cs01-05/2026-08-27https://scholafly.com/assets/thumbs/cs01-05.jpgBinary and hexadecimalIn this video you'll learn about binary and hexadecimal for GCSE Computer Science.https://www.youtube.com/embed/QNt2RchgCJg7752026-08-27T17:17:46+01:00yes https://scholafly.com/lesson/cs01-06/2026-08-27https://scholafly.com/assets/thumbs/cs01-06.jpgBinary additionIn this video you'll learn about binary addition for GCSE Computer Science.https://www.youtube.com/embed/tMuW9_Vn7Ig7822026-08-27T03:31:14+01:00yes https://scholafly.com/lesson/cs01-07/2026-08-27https://scholafly.com/assets/thumbs/cs01-07.jpgOverflowIn this video you'll learn about overflow for GCSE Computer Science.https://www.youtube.com/embed/hDSxVYkfpzk7222026-08-27T00:57:24+01:00yes https://scholafly.com/lesson/cs02-00/2026-08-28https://scholafly.com/assets/thumbs/cs02-00.jpgChapter intro: Units, characters and file sizeIn this video you'll learn about units, characters and file size - intro for GCSE Computer Science. For: AQA, Edexcel, OCR GCSE Computer Sciencehttps://www.youtube.com/embed/09-qBlPgybs2042026-08-28T12:24:34+01:00yes https://scholafly.com/lesson/cs02-01/2026-08-27https://scholafly.com/assets/thumbs/cs02-01.jpgBits, bytes and the units of storageIn this video you'll learn about bits, bytes and the units of storage for GCSE Computer Science, with worked examples and the mistakes examiners report. By the end you'll be able to state that a bit is the fundamental unit of information and a byte is a group of 8 bits, name and order the units of storage, convert between them, and say which convention each exam board uses.https://www.youtube.com/embed/6NVNIeA80bU10092026-08-27T17:59:31+01:00yes https://scholafly.com/lesson/cs02-02/2026-08-28https://scholafly.com/assets/thumbs/cs02-02.jpgCharacter sets and ASCIIIn this video you'll learn about character sets and ASCII for GCSE Computer Science, with worked examples and the mistakes examiners report. By the end you'll be able to explain what a character set is, describe how characters are represented in binary using ASCII, and relate the number of bits per character to how many characters can be represented - naming which board uses 7 bits and which uses 8.https://www.youtube.com/embed/zD9_Zs-lSWE8602026-08-28T15:03:29+01:00yes https://scholafly.com/lesson/cs02-03/2026-08-28https://scholafly.com/assets/thumbs/cs02-03.jpgCharacter codes run in orderIn this video you'll learn about character codes run in order for GCSE Computer Science, with worked examples and the mistakes examiners report. By the end you'll be able to explain that character codes are commonly grouped and run in sequence within an encoding table, and work out an unknown code from a known one, in denary and in binary, without a table.https://www.youtube.com/embed/Oz94XpnG-qA7292026-08-28T05:49:43+01:00yes https://scholafly.com/lesson/cs04-00/2026-09-25https://scholafly.com/assets/thumbs/cs04-00.jpgChapter intro: Inside the computerIn this video you'll learn about inside the computer - intro for GCSE Computer Science. For: AQA, Edexcel, OCR GCSE Computer Sciencehttps://www.youtube.com/embed/hs8NhRKFY781592026-09-25T22:09:58+01:00yes https://scholafly.com/lesson/cs04-01/2026-09-24https://scholafly.com/assets/thumbs/cs04-01.jpgHardware and softwareIn this video you'll learn about hardware and software for GCSE Computer Science.https://www.youtube.com/embed/blvJe83wRWY3982026-09-24T07:43:09+01:00yes https://scholafly.com/lesson/cs04-02/2026-09-26https://scholafly.com/assets/thumbs/cs04-02.jpgThe CPU and the von Neumann modelIn this video you'll learn about the CPU and the von neumann model for GCSE Computer Science, with worked examples and the mistakes examiners report. By the end you'll be able to explain the von Neumann stored program concept - that instructions and data are held together in the same main memory - and state the role of main memory and of each named CPU component: the control unit, the arithmetic logic unit, the clock, a register, the buses that connect them and, for OCR, the cache.https://www.youtube.com/embed/NaTcxQbZh9s7692026-09-26T01:05:02+01:00yes https://scholafly.com/lesson/cs04-03/2026-09-25https://scholafly.com/assets/thumbs/cs04-03.jpgThe registers: MAR, MDR, PC and AccumulatorIn this video you'll learn about the registers: MAR, MDR, PC and accumulator for GCSE Computer Science, with worked examples and the mistakes examiners report. By the end you'll be able to state what each of the MAR, the MDR, the Program Counter and the Accumulator stores, and tell an ADDRESS from DATA - saying for each register which of the two it holds and why that is the distinction the mark scheme pays for.https://www.youtube.com/embed/kij8F7dsp5c9702026-09-25T16:33:34+01:00yes https://scholafly.com/lesson/cs04-04/2026-09-26https://scholafly.com/assets/thumbs/cs04-04.jpgThe fetch-execute cycleIn this video you'll learn about the fetch-execute cycle for GCSE Computer Science, with worked examples and the mistakes examiners report. By the end you'll be able to explain what happens at each stage of the fetch-execute cycle - fetch, decode, execute - say why it is a cycle rather than a list, use the name your own board uses, and describe the part main memory plays in it without describing the whole cycle when only that part was asked for.https://www.youtube.com/embed/dKIBxuO50ek5782026-09-26T02:46:34+01:00yes https://scholafly.com/lesson/cs04-05/2026-09-24https://scholafly.com/assets/thumbs/cs04-05.jpgWhat makes a CPU fastIn this video you'll learn about what makes a CPU fast for GCSE Computer Science, with worked examples and the mistakes examiners report. By the end you'll be able to explain what clock speed, cache size and the number of cores each are, say precisely how each one affects the performance of the CPU and why, and reason about what happens when more than one of them changes at once - including why more cores does not always mean a faster machine.https://www.youtube.com/embed/uaAk2JjU_b45902026-09-24T18:52:02+01:00yes https://scholafly.com/lesson/cs04-06/2026-09-29https://scholafly.com/assets/thumbs/cs04-06.jpgEmbedded systemsIn this video you'll learn about embedded systems for GCSE Computer Science, with worked examples and the mistakes examiners report. By the end you'll be able to explain what an embedded system is and give its typical characteristics, say how it differs from a non-embedded system with examples of both, and - given a real device in a scenario - state the specific job its embedded system does rather than repeating the words in the question.https://www.youtube.com/embed/yHz8ZsQ3nh06652026-09-29T11:14:02+01:00yes https://scholafly.com/lesson/ma01-01/2026-08-12https://scholafly.com/assets/thumbs/ma01-01.jpgOrdering positive and negative numbers using inequality symbolsIn this video you'll learn about ordering numbers for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to order a mixed list of positive integers, negative integers, decimals and fractions, and compare any two of them correctly using =, ＜, ＞, ≤, ≥.https://www.youtube.com/embed/sMdZLrd3FYE8002026-08-12T23:46:27+01:00yes https://scholafly.com/lesson/ma01-02/2026-08-13https://scholafly.com/assets/thumbs/ma01-02.jpgPlace value and decimal notationIn this video you'll learn about place value and decimal notation for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to read and write the value of any digit in a large whole number or a decimal, and use decimal notation correctly.https://www.youtube.com/embed/x5vA5QwuGAk9172026-08-13T01:00:39+01:00yes https://scholafly.com/lesson/ma01-03/2026-08-13https://scholafly.com/assets/thumbs/ma01-03.jpgAdding, subtracting, multiplying and dividing positive and negative integersIn this video you'll learn about negative numbers for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to add, subtract, multiply and divide positive and negative whole numbers using a formal written method, including in practical contexts like temperature.https://www.youtube.com/embed/-MizrHWT6EE7262026-08-13T02:49:14+01:00yes https://scholafly.com/lesson/ma01-04/2026-08-13https://scholafly.com/assets/thumbs/ma01-04.jpgAdding, subtracting, multiplying and dividing decimalsIn this video you'll learn about adding, subtracting, multiplying and dividing decimals for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to add, subtract, multiply and divide decimals using a formal written method, keeping the decimal point correctly aligned throughout.https://www.youtube.com/embed/fD10-TYhNro8162026-08-13T04:58:18+01:00yes https://scholafly.com/lesson/ma01-05/2026-08-13https://scholafly.com/assets/thumbs/ma01-05.jpgOrder of operations: brackets, powers, roots and BIDMASIn this video you'll learn about order of operations: brackets, powers, roots and BIDMAS for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to evaluate an expression involving brackets, powers, roots and the four operations in the correct priority order, including entering it correctly into a calculator.https://www.youtube.com/embed/kMMe8sJN0Zs7562026-08-13T08:16:04+01:00yes https://scholafly.com/lesson/ma01-06/2026-08-13https://scholafly.com/assets/thumbs/ma01-06.jpgInverse operationsIn this video you'll learn about inverse operations for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to reverse a multi-step calculation by applying the correct inverse operation to every step, in the reverse order, to find an unknown starting value.https://www.youtube.com/embed/y30L2uT6DO48442026-08-13T12:51:48+01:00yes https://scholafly.com/lesson/ma02-01/2026-08-12https://scholafly.com/assets/thumbs/ma02-01.jpgTypes of number and prime factorisationIn this video you'll learn about types of number and prime factorisation for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to identify natural numbers, integers, primes, square numbers, cube numbers, rational and irrational numbers and reciprocals, then express any given integer as a product of its prime factors using index notation.https://www.youtube.com/embed/WDGmQy1USd07112026-08-12T20:57:54+01:00yes https://scholafly.com/lesson/ma02-02/2026-08-12https://scholafly.com/assets/thumbs/ma02-02.jpgHighest common factor (HCF)In this video you'll learn about highest common factor (HCF) for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to find the highest common factor of two or more numbers by listing factors or using prime factorisation, correctly extracting the HCF from the shared factors and showing enough working to earn full marks.https://www.youtube.com/embed/MgpRvdhC_Ow6092026-08-12T20:58:48+01:00yes https://scholafly.com/lesson/ma02-03/2026-08-12https://scholafly.com/assets/thumbs/ma02-03.jpgLowest common multiple (LCM)In this video you'll learn about lowest common multiple (LCM) for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to find the lowest common multiple of two or more numbers by listing multiples or using prime factorisation, with the method held directly side by side against HCF so the two are never confused again.https://www.youtube.com/embed/p-qt_5NuLyM5662026-08-12T20:59:55+01:00yes https://scholafly.com/lesson/ma02-04/2026-08-12https://scholafly.com/assets/thumbs/ma02-04.jpgSystematic listing strategiesIn this video you'll learn about systematic listing strategies for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to list all the possible outcomes of a constrained problem systematically, using an ordered list, table or grid, without missing or duplicating a case.https://www.youtube.com/embed/dDibyef3-yM4652026-08-12T21:00:49+01:00yes https://scholafly.com/lesson/ma02-05/2026-08-12https://scholafly.com/assets/thumbs/ma02-05.jpgThe product rule for counting (Higher)In this video you'll learn about the product rule for counting (higher) for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to apply the product rule (m x n) to count the total number of combined outcomes across two or more independent choices, instead of listing every outcome by hand.https://www.youtube.com/embed/NRcMt7eZoc04862026-08-12T21:01:35+01:00yes https://scholafly.com/lesson/ma03-01/2026-08-14https://scholafly.com/assets/thumbs/ma03-01.jpgSquare numbers, cube numbers and calculating themIn this video you'll learn about square numbers, cube numbers and calculating them for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to identify square numbers and cube numbers, and calculate squares and cubes of integers, recalling key values up to 15 squared and up to 5 cubed and 10 cubed from memory.https://www.youtube.com/embed/5oqgjiJ8mKo7902026-08-14T15:44:10+01:00yes https://scholafly.com/lesson/ma03-02/2026-08-14https://scholafly.com/assets/thumbs/ma03-02.jpgSquare roots, cube roots and higher rootsIn this video you'll learn about square roots, cube roots and higher roots for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to find square roots, cube roots and higher (e.g. fourth) roots as the inverse of the corresponding power, including undoing a square at the end of a calculation, and estimate a root that isn't exact by bounding it between two known values.https://www.youtube.com/embed/UCfwQWlk9zg7882026-08-14T20:25:47+01:00yes https://scholafly.com/lesson/ma03-03/2026-08-15https://scholafly.com/assets/thumbs/ma03-03.jpgIndex laws: multiplying and dividing powersIn this video you'll learn about index laws: multiplying and dividing powers for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to apply the index laws a^m x a^n = a^(m+n) and a^m / a^n = a^(m-n) to simplify or evaluate numeric powers of the same base, without evaluating each power individually first.https://www.youtube.com/embed/QXRWyzz9Nsk7162026-08-15T14:10:55+01:00yes https://scholafly.com/lesson/ma03-04/2026-08-15https://scholafly.com/assets/thumbs/ma03-04.jpgPower of a power, and zero and negative indicesIn this video you'll learn about power of a power, and zero and negative indices for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to apply (a^m)^n = a^(mn), and evaluate a^0 = 1 and a^-n as the reciprocal 1/a^n, for numeric bases.https://www.youtube.com/embed/njpRI_KjA146352026-08-15T16:49:40+01:00yes https://scholafly.com/lesson/ma03-05/2026-08-12https://scholafly.com/assets/thumbs/ma03-05.jpgFractional indices (Higher)In this video you'll learn about fractional indices (higher) for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to interpret and evaluate a fractional index a^(m/n) as the nth root of a, raised to the power m (or the nth root of a^m), including when the index is also negative.https://www.youtube.com/embed/PWk1qTS4Nfc7182026-08-12T16:38:48+01:00yes https://scholafly.com/lesson/ma03-06/2026-08-13https://scholafly.com/assets/thumbs/ma03-06.jpgConverting to and from standard formIn this video you'll learn about converting to and from standard form for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to convert a positive number between ordinary (decimal) form and standard form A x 10^n, keeping the coefficient A between 1 and 10.https://www.youtube.com/embed/tSNJ-ZkAAUg8092026-08-13T18:43:12+01:00yes https://scholafly.com/lesson/ma03-07/2026-08-13https://scholafly.com/assets/thumbs/ma03-07.jpgCalculating with numbers in standard formIn this video you'll learn about calculating with numbers in standard form for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to add, subtract, multiply and divide numbers already given in standard form, with and without a calculator, giving the final answer correctly re-expressed in standard form.https://www.youtube.com/embed/78nGhLFUsAo7912026-08-13T22:42:54+01:00yes https://scholafly.com/lesson/ma03-08/2026-08-14https://scholafly.com/assets/thumbs/ma03-08.jpgSolving problems in standard form (Higher)In this video you'll learn about solving problems in standard form (higher) for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to solve a multi-step word problem that combines a standard-form value with an ordinary number, choosing the correct operation from the context and converting the final answer back into standard form.https://www.youtube.com/embed/auSALWG-CBo7572026-08-14T04:34:08+01:00yes https://scholafly.com/lesson/ma04-01/2026-08-14https://scholafly.com/assets/thumbs/ma04-01.jpgEquivalent fractions and simplifying by cancellingIn this video you'll learn about equivalent fractions and simplifying by cancelling for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to simplify any fraction to its lowest terms by cancelling common factors, and generate an equivalent fraction by multiplying or dividing the numerator and denominator by the same number.https://www.youtube.com/embed/-MemdOfXR-84852026-08-14T20:20:21+01:00yes https://scholafly.com/lesson/ma04-02/2026-08-14https://scholafly.com/assets/thumbs/ma04-02.jpgMixed numbers and improper (vulgar) fractionsIn this video you'll learn about mixed numbers and improper (vulgar) fractions for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to convert a mixed number to an improper fraction, and an improper fraction back to a mixed number, using the correct multiply-add (and divide-remainder) process in the right order.https://www.youtube.com/embed/5COBrQTrj1A5212026-08-14T22:51:44+01:00yes https://scholafly.com/lesson/ma04-03/2026-08-15https://scholafly.com/assets/thumbs/ma04-03.jpgFinding a common denominatorIn this video you'll learn about finding a common denominator for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to find a common denominator for two or more fractions by using the LCM of the denominators, rather than an unnecessarily large denominator.https://www.youtube.com/embed/51pkngfVAeU6142026-08-15T00:26:07+01:00yes https://scholafly.com/lesson/ma04-04/2026-08-15https://scholafly.com/assets/thumbs/ma04-04.jpgAdding and subtracting fractions and mixed numbersIn this video you'll learn about adding and subtracting fractions and mixed numbers for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to add and subtract fractions and mixed numbers, including negatives, by first rewriting them over a common denominator.https://www.youtube.com/embed/LtCudDLgqKs5902026-08-15T02:08:15+01:00yes https://scholafly.com/lesson/ma04-05/2026-08-15https://scholafly.com/assets/thumbs/ma04-05.jpgMultiplying and dividing fractions and mixed numbersIn this video you'll learn about multiplying and dividing fractions and mixed numbers for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to multiply fractions straight across (cancelling common factors first where useful) and divide fractions by inverting the second fraction and multiplying, converting any mixed numbers to improper fractions first.https://www.youtube.com/embed/GIhIoIZhAe86162026-08-15T08:02:43+01:00yes https://scholafly.com/lesson/ma04-06/2026-08-15https://scholafly.com/assets/thumbs/ma04-06.jpgFraction of a quantity; expressing a number as a fraction of anotherIn this video you'll learn about fraction of an amount for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to calculate a fraction of a quantity, and express one quantity as a fraction of another by correctly identifying which number is the whole.https://www.youtube.com/embed/P2kvgoDfm_06732026-08-15T08:03:17+01:00yes https://scholafly.com/lesson/ma04-07/2026-08-15https://scholafly.com/assets/thumbs/ma04-07.jpgConverting between fractions, decimals and percentagesIn this video you'll learn about converting between fractions, decimals and percentages for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to convert fluently between a fraction, a terminating decimal and a percentage, and use a shared form to compare or order values given in different forms.https://www.youtube.com/embed/w6mjJgmWRf85862026-08-15T08:03:49+01:00yes https://scholafly.com/lesson/ma04-08/2026-08-15https://scholafly.com/assets/thumbs/ma04-08.jpgConverting recurring decimals into fractions (Higher)In this video you'll learn about converting recurring decimals into fractions (higher) for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to convert a recurring decimal into its exact fraction using the algebraic method: set up x equal to the decimal, multiply by the right power of 10, subtract to eliminate the recurring part, and solve for x.https://www.youtube.com/embed/E2-BA1U2j7A7062026-08-15T13:44:45+01:00yes https://scholafly.com/lesson/ma05-01/2026-08-16https://scholafly.com/assets/thumbs/ma05-01.jpgCalculating exactly with fractionsIn this video you'll learn about calculating exactly with fractions for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to give an exact fraction answer to a calculation and recognise that 'exact', 'as a fraction' or 'in its simplest form' instructions forbid converting to a decimal or percentage.https://www.youtube.com/embed/c30lrsW4DdI5392026-08-16T13:21:17+01:00yes https://scholafly.com/lesson/ma05-02/2026-08-16https://scholafly.com/assets/thumbs/ma05-02.jpgCalculating exactly with multiples of piIn this video you'll learn about calculating exactly with multiples of pi for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to leave a circle-calculation answer as a multiple of pi instead of substituting a rounded decimal value, when the question says 'in terms of pi' or 'as a multiple of pi'.https://www.youtube.com/embed/OH968oh9lto6552026-08-16T01:13:58+01:00yes https://scholafly.com/lesson/ma05-03/2026-08-16https://scholafly.com/assets/thumbs/ma05-03.jpgSimplifying surds (Higher)In this video you'll learn about simplifying surds (higher) for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to simplify a surd by splitting it into the product of its largest square factor and a remaining surd, and simplify the result of multiplying two surds together.https://www.youtube.com/embed/uk-rc9MXf8g6142026-08-16T17:11:26+01:00yes https://scholafly.com/lesson/ma05-04/2026-08-16https://scholafly.com/assets/thumbs/ma05-04.jpgRationalising the denominator (Higher)In this video you'll learn about rationalising the denominator (higher) for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to rationalise a surd denominator by multiplying both the numerator and the denominator by the same root, rather than simply deleting the root sign from the denominator.https://www.youtube.com/embed/EIY9_nr-I8k7552026-08-16T04:40:12+01:00yes https://scholafly.com/lesson/ma06-01/2026-08-16https://scholafly.com/assets/thumbs/ma06-01.jpgSets: definitions and notation (union, intersection, element of)In this video you'll learn about sets: definitions and notation (union, intersection, element of) for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to define a set in listed or algebraic (set-builder) form and use the notation ∪ (union), ∩ (intersection) and ∈ (is an element of) to describe how two sets relate.https://www.youtube.com/embed/edNiR5F4_Xo7732026-08-16T07:11:57+01:00yes https://scholafly.com/lesson/ma06-02/2026-08-16https://scholafly.com/assets/thumbs/ma06-02.jpgVenn diagrams: universal set, empty set and complementIn this video you'll learn about venn diagrams: universal set, empty set and complement for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to construct a two-set Venn diagram from given information by filling the intersection first and working outward - including the 'outside both circles' region - then read off the universal set, empty set and complement of a set from a completed diagram.https://www.youtube.com/embed/evPWtnGa9aM9062026-08-16T20:14:13+01:00yes https://scholafly.com/lesson/ma06-03/2026-08-17https://scholafly.com/assets/thumbs/ma06-03.jpgAlgebraic set definitions and subsets (Higher)In this video you'll learn about algebraic set definitions and subsets (higher) for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to interpret a set defined by an algebraic condition (e.g. A = {x : x is a natural number, x ＜ 10}) and use subset notation A ⊆ B to state that every element of one set also belongs to another.https://www.youtube.com/embed/yTrcU7PTzIE9542026-08-17T13:22:50+01:00yes https://scholafly.com/lesson/ma06-04/2026-08-17https://scholafly.com/assets/thumbs/ma06-04.jpgThree-set Venn diagrams, element counts and n(A) notation (Higher)In this video you'll learn about three-set venn diagrams for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to interpret worded information about three overlapping groups to complete a three-set Venn diagram starting from the centre outward, and use n(A) notation to state the number of elements in a set or region.https://www.youtube.com/embed/Z9b3H-wZ_cI10122026-08-17T13:26:23+01:00yes https://scholafly.com/lesson/ma11-01/2026-08-17https://scholafly.com/assets/thumbs/ma11-01.jpgSolving Linear Equations by BalancingIn this video you'll learn about solving linear equations by balancing for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to solve a linear equation with the unknown on one or both sides, including one with a fractional coefficient, by applying the same operation to both sides.https://www.youtube.com/embed/PZ7pYCVwDAU7562026-08-17T00:01:14+01:00yes https://scholafly.com/lesson/ma11-02/2026-08-17https://scholafly.com/assets/thumbs/ma11-02.jpgSolving Linear Equations with BracketsIn this video you'll learn about solving linear equations with brackets for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to solve a linear equation that requires expanding one or more brackets first, by multiplying every term inside each bracket before balancing.https://www.youtube.com/embed/Jlm-uHhWreU6852026-08-17T13:12:57+01:00yes https://scholafly.com/lesson/ma11-03/2026-08-16https://scholafly.com/assets/thumbs/ma11-03.jpgUsing and Rearranging a Formula (Subject Appears Once)In this video you'll learn about using and rearranging a formula (subject appears once) for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to locate and correctly use a given standard formula, then rearrange a formula to make a different subject when that subject appears only once.https://www.youtube.com/embed/ZQYdM8241z86902026-08-16T20:53:28+01:00yes https://scholafly.com/lesson/ma11-04/2026-08-21https://scholafly.com/assets/thumbs/ma11-04.jpgRearranging Harder Formulae (Subject Appears Twice, or Under a Power/Root)In this video you'll learn about rearranging harder formulae for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to rearrange a formula to change the subject when that subject appears twice, or when the subject is under a power or a root, by factorising or by squaring/rooting both sides.https://www.youtube.com/embed/nGNt700NFE07272026-08-21T08:34:57+01:00yes https://scholafly.com/lesson/ma11-05/2026-08-16https://scholafly.com/assets/thumbs/ma11-05.jpgWriting an Expression or Formula from a ContextIn this video you'll learn about writing an expression or formula from a context for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to translate a described real-world or mathematical situation into an algebraic expression or formula, including combining two given relationships into one.https://www.youtube.com/embed/-HqAAn6BLPQ6102026-08-16T23:19:11+01:00yes https://scholafly.com/lesson/ma11-06/2026-08-17https://scholafly.com/assets/thumbs/ma11-06.jpgSetting Up and Solving an Equation from a ContextIn this video you'll learn about setting up and solving an equation from a context for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to derive an equation from a described or geometric situation, solve it, and interpret the answer back in the context it came from.https://www.youtube.com/embed/-64DY-CqL7U7982026-08-17T00:34:45+01:00yes https://scholafly.com/lesson/ma11-07/2026-08-17https://scholafly.com/assets/thumbs/ma11-07.jpgRecalling Circle, Pythagoras and Trig FormulaeIn this video you'll learn about recalling circle, pythagoras and trig formulae for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to recall circle circumference and area, Pythagoras' theorem, and right-angled trig ratios from memory, and apply each correctly to a single triangle or circle.https://www.youtube.com/embed/p2qkCEcuLCM9262026-08-17T07:31:48+01:00yes https://scholafly.com/lesson/ma11-08/2026-08-17https://scholafly.com/assets/thumbs/ma11-08.jpgChoosing Between the Quadratic Formula, Sine Rule, Cosine Rule and Area FormulaIn this video you'll learn about choosing the right formula for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to recall the quadratic formula, sine rule, cosine rule and triangle area formula, and choose correctly between them based on what a problem gives.https://www.youtube.com/embed/qHqd9bp5jeo7602026-08-17T01:05:56+01:00yes https://scholafly.com/lesson/ma11-09/2026-08-21https://scholafly.com/assets/thumbs/ma11-09.jpgUsing the Kinematics (SUVAT) FormulaeIn this video you'll learn about kinematics (SUVAT) formulae for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to recall what each letter in the SUVAT formulae represents, recognise when constant acceleration requires a SUVAT formula rather than speed = distance/time, and substitute correctly.https://www.youtube.com/embed/b5zccNHuLMM8042026-08-21T08:33:36+01:00yes https://scholafly.com/lesson/ma12-01/2026-08-18https://scholafly.com/assets/thumbs/ma12-01.jpgSolving x^2+bx+c=0 by FactorisingIn this video you'll learn about solving x^2+bx+c=0 by factorising for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to solve a quadratic equation already written as x^2+bx+c=0 by factorising, correctly finding both roots.https://www.youtube.com/embed/7JIB6AH19QU7052026-08-18T05:21:12+01:00yes https://scholafly.com/lesson/ma12-02/2026-08-18https://scholafly.com/assets/thumbs/ma12-02.jpgRearranging and Factorising a General Quadratic EquationIn this video you'll learn about rearranging and factorising a general quadratic equation for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to rearrange a quadratic equation into ax^2+bx+c=0 form - including forming it from a context - then solve it by factorising or completing the square.https://www.youtube.com/embed/9cRMxzr1WzA9082026-08-18T08:26:15+01:00yes https://scholafly.com/lesson/ma12-03/2026-08-18https://scholafly.com/assets/thumbs/ma12-03.jpgSolving a Quadratic with the Quadratic FormulaIn this video you'll learn about solving a quadratic with the quadratic formula for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to solve a quadratic equation using the quadratic formula, substituting values correctly and rejecting any root that doesn't fit the context.https://www.youtube.com/embed/z3vzTJ1ddo09292026-08-18T06:28:37+01:00yes https://scholafly.com/lesson/ma12-04/2026-08-20https://scholafly.com/assets/thumbs/ma12-04.jpgSolving Simultaneous Linear Equations by EliminationIn this video you'll learn about simultaneous by elimination for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to solve a pair of simultaneous linear equations by eliminating one variable through multiplying and then adding or subtracting.https://www.youtube.com/embed/kR5O5fwczoY8802026-08-20T21:12:11+01:00yes https://scholafly.com/lesson/ma12-05/2026-08-21https://scholafly.com/assets/thumbs/ma12-05.jpgSimultaneous Equations: One Linear, One QuadraticIn this video you'll learn about one linear, one quadratic for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to solve a pair of simultaneous equations where one is linear and one is quadratic, using substitution and correctly pairing each solution.https://www.youtube.com/embed/_plC7xVqJIs8862026-08-21T08:31:48+01:00yes https://scholafly.com/lesson/ma12-06/2026-09-26https://scholafly.com/assets/thumbs/ma12-06.jpgGraph Intersections as Simultaneous SolutionsIn this video you'll learn about graph intersections for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to explain why the coordinates of a graph intersection point are the solution to the two equations it represents.https://www.youtube.com/embed/DpTDa0tHn3c6272026-09-26T21:46:29+01:00yes https://scholafly.com/lesson/ma12-07/2026-08-20https://scholafly.com/assets/thumbs/ma12-07.jpgSolving Equations by IterationIn this video you'll learn about solving by iteration for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to find an approximate solution to an equation by repeatedly applying a given iterative formula, and justify that a root lies in a given interval using a change of sign.https://www.youtube.com/embed/frC4fffzFcI8492026-08-20T21:41:16+01:00yes https://scholafly.com/lesson/ma12-08/2026-08-24https://scholafly.com/assets/thumbs/ma12-08.jpgSolving Equations with Algebraic FractionsIn this video you'll learn about equations with algebraic fractions for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to solve an equation containing algebraic fractions by multiplying through to clear the denominators.https://www.youtube.com/embed/hrSpNb-Hqy46982026-08-24T20:42:59+01:00yes https://scholafly.com/lesson/ma13-02/2026-08-21https://scholafly.com/assets/thumbs/ma13-02.jpgRecognising Special SequencesIn this video you'll learn about recognising special sequences for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to recognise a sequence as belonging to a special family (square, triangular, cube, Fibonacci-type, quadratic, or simple geometric) and state the generalising rule that produces it.https://www.youtube.com/embed/4n9znbhEP6U7672026-08-21T08:36:33+01:00yes https://scholafly.com/lesson/ma13-03/2026-08-20https://scholafly.com/assets/thumbs/ma13-03.jpgSequences with a Surd Common RatioIn this video you'll learn about surd common ratio for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to generate terms of a geometric-type sequence whose common ratio is a surd, finding and using that ratio directly in surd form rather than converting to a decimal.https://www.youtube.com/embed/kwHbJ1DDcH48792026-08-20T23:32:10+01:00yes https://scholafly.com/lesson/ma13-04/2026-08-21https://scholafly.com/assets/thumbs/ma13-04.jpgFinding the nth Term of a Linear SequenceIn this video you'll learn about nth term of a linear sequence for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to deduce an algebraic expression for the nth term of a linear sequence, correctly distinguishing it from the term-to-term rule.https://www.youtube.com/embed/VsxvZ0_u1aE9392026-08-21T08:20:15+01:00yes https://scholafly.com/lesson/ma13-05/2026-08-21https://scholafly.com/assets/thumbs/ma13-05.jpgFinding the nth Term of a Quadratic SequenceIn this video you'll learn about nth term of a quadratic sequence for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to deduce an algebraic expression for the nth term of a quadratic sequence, using second differences to find the n-squared coefficient and then isolating the remaining linear part.https://www.youtube.com/embed/T2V_wFfzmns9092026-08-21T08:18:47+01:00yes https://scholafly.com/lesson/ma13-06/2026-08-21https://scholafly.com/assets/thumbs/ma13-06.jpgFinding the nth Term of a Cubic SequenceIn this video you'll learn about nth term of a cubic sequence for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to find and use an expression for the nth term of a simple cubic sequence, extending the second-differences method to a third, constant difference.https://www.youtube.com/embed/d1cTpn-dJUc8272026-08-21T08:29:23+01:00yes https://scholafly.com/lesson/ma13-07/2026-08-24https://scholafly.com/assets/thumbs/ma13-07.jpgFinding the nth Term of an Exponential SequenceIn this video you'll learn about nth term of an exponential sequence for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to find and use an expression for the nth term of an exponential (geometric) sequence in r^n form, including simple sequences built by combining an exponential part with a linear part.https://www.youtube.com/embed/_OEtzYl-gpo9052026-08-24T02:34:42+01:00yes https://scholafly.com/lesson/ma13-08/2026-08-24https://scholafly.com/assets/thumbs/ma13-08.jpgSum of an Arithmetic SeriesIn this video you'll learn about sum of an arithmetic series for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to find the sum of the first n terms of an arithmetic series, including setting up and solving the equations (sometimes a quadratic) that arise from sum and term information, and selecting the answer that is valid in context.https://www.youtube.com/embed/jywCM5QWQlg9762026-08-24T07:23:25+01:00yes https://scholafly.com/lesson/ma14-01/2026-08-20https://scholafly.com/assets/thumbs/ma14-01.jpgFunction Machines: Inputs, Outputs and ReversingIn this video you'll learn about function machines for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to reverse a two-step function machine to find an unknown input, by inverting both the operations and their order.https://www.youtube.com/embed/qv8NwpEi9-45582026-08-20T21:36:37+01:00yes https://scholafly.com/lesson/ma14-02/2026-09-27https://scholafly.com/assets/thumbs/ma14-02.jpgInverse and Composite FunctionsIn this video you'll learn about inverse and composite functions for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to find the composite of two functions and the inverse of a function using input-output machine language, applying board-specific f(x)/fg(x) notation where it is required.https://www.youtube.com/embed/l--_ztiQrN08202026-09-27T10:48:45+01:00yes https://scholafly.com/lesson/ma14-03/2026-08-20https://scholafly.com/assets/thumbs/ma14-03.jpgFormal Function Notation: Domain and RangeIn this video you'll learn about domain and range for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to use formal function notation to find composite and inverse functions, and check a solution against a stated domain restriction.https://www.youtube.com/embed/RZVpF-02lJc7682026-08-20T23:25:11+01:00yes https://scholafly.com/lesson/ma14-04/2026-08-20https://scholafly.com/assets/thumbs/ma14-04.jpgDifferentiating Powers of xIn this video you'll learn about differentiating powers of x for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to differentiate a sum of integer-power terms of x using the power rule, and recognise when a question requires differentiation.https://www.youtube.com/embed/85RuOafVCZI9502026-08-20T22:12:33+01:00yes https://scholafly.com/lesson/ma14-05/2026-08-20https://scholafly.com/assets/thumbs/ma14-05.jpgStationary Points: Maxima and MinimaIn this video you'll learn about stationary points for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to apply differentiation to find the gradient at a specific point or a stated gradient value, and separately to find and classify stationary points as maxima or minima.https://www.youtube.com/embed/B81gfh3fJyQ8292026-08-20T22:05:32+01:00yes https://scholafly.com/lesson/ma14-06/2026-08-24https://scholafly.com/assets/thumbs/ma14-06.jpgApplying Calculus to Kinematics ProblemsIn this video you'll learn about calculus and kinematics for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to apply differentiation to a linear kinematics problem, to find velocity from displacement and acceleration from velocity, and to other simple practical rate-of-change problems.https://www.youtube.com/embed/ov2woaskfJw9792026-08-24T20:45:56+01:00yes https://scholafly.com/lesson/ma15-01/2026-08-24https://scholafly.com/assets/thumbs/ma15-01.jpgCoordinates in Four QuadrantsIn this video you'll learn about coordinates in four quadrants for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to plot and read coordinates correctly in all four quadrants, including locating a point that must satisfy a stated constraint shown on a diagram.https://www.youtube.com/embed/mFdrb1nxXKs6492026-08-24T17:12:59+01:00yes https://scholafly.com/lesson/ma23-01/2026-09-23https://scholafly.com/assets/thumbs/ma23-01.jpgPerimeter of 2D and composite shapesIn this video you'll learn about perimeter of 2D and composite shapes for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to calculate the perimeter of rectilinear and composite 2D shapes, including shapes where part of the boundary is a circular arc.https://www.youtube.com/embed/fX8rlkSdZZM4412026-09-23T08:50:07+01:00yes https://scholafly.com/lesson/ma23-02/2026-09-23https://scholafly.com/assets/thumbs/ma23-02.jpgArea of triangles, parallelograms and trapeziaIn this video you'll learn about area of triangles, parallelograms and trapezia for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to apply the area formulae for triangles, parallelograms and trapezia, including questions where the perpendicular height is not given directly and must be found first.https://www.youtube.com/embed/J2D-_FrSUKQ4162026-09-23T03:50:02+01:00yes https://scholafly.com/lesson/ma23-03/2026-09-23https://scholafly.com/assets/thumbs/ma23-03.jpgCircle circumference and areaIn this video you'll learn about circle circumference and area for GCSE Maths, with worked examples and the mistakes examiners report.https://www.youtube.com/embed/JMK8xGr0e1c7042026-09-23T11:07:43+01:00yes https://scholafly.com/lesson/ma23-04/2026-09-23https://scholafly.com/assets/thumbs/ma23-04.jpgArc length and sector area, including major sectorsIn this video you'll learn about arc length and sector area, including major sectors for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to calculate arc length and sector area for a circle sector given its radius and angle, including major (reflex-angle) sectors and algebraic 'show that' problems.https://www.youtube.com/embed/k-LljC0MgD08182026-09-23T12:08:30+01:00yes https://scholafly.com/lesson/ma24-01/2026-08-24https://scholafly.com/assets/thumbs/ma24-01.jpgConstructing the perpendicular bisector of a line segmentIn this video you'll learn about bisect a line for GCSE Maths, with a worked example and the mistakes examiners report. By the end you'll be able to construct the perpendicular bisector of a line segment using only a ruler and compasses, leaving all construction arcs visible.https://www.youtube.com/embed/YUx75daUUZg4482026-08-24T02:40:36+01:00yes https://scholafly.com/lesson/ma32-01/2026-08-24https://scholafly.com/assets/thumbs/ma32-01.jpgMean, median, mode and rangeIn this video you'll learn about mean, median, mode and range for GCSE Maths, with worked examples and the mistakes examiners report. By the end you'll be able to calculate the mean, median, mode and range for a list of individual data values, knowing which average serves which purpose.https://www.youtube.com/embed/XYT81r-jE-85062026-08-24T02:44:45+01:00yes https://scholafly.com/lesson/ph01-00/2026-09-28https://scholafly.com/assets/thumbs/ph01-00.jpgChapter intro: Units and describing motionIn this video you'll learn about units and describing motion for GCSE Physics. Video code: PH01-00 - search YouTube for "ScholaFly PH01-00" to come straight back to this video.https://www.youtube.com/embed/f-SD4LQ2FPE1472026-09-28T10:00:41+01:00yes https://scholafly.com/lesson/ph01-01/2026-09-28https://scholafly.com/assets/thumbs/ph01-01.jpgUnits, prefixes and standard form in physicsIn this video you'll learn about units, prefixes and standard form for GCSE Physics. Video code: PH01-01 - search YouTube for "ScholaFly PH01-01" to come straight back to this video.https://www.youtube.com/embed/ULArXQqXU5Q8482026-09-28T08:27:52+01:00yes https://scholafly.com/lesson/ph01-02/2026-09-28https://scholafly.com/assets/thumbs/ph01-02.jpgScalars and vectorsIn this video you'll learn about scalars and vectors for GCSE Physics. Video code: PH01-02 - search YouTube for "ScholaFly PH01-02" to come straight back to this video.https://www.youtube.com/embed/Z6zOwqb1OYk5102026-09-28T12:06:43+01:00yes https://scholafly.com/lesson/ph01-03/2026-09-28https://scholafly.com/assets/thumbs/ph01-03.jpgDistance and displacementIn this video you'll learn about distance and displacement for GCSE Physics.https://www.youtube.com/embed/Pnuu-njpyb43942026-09-28T14:02:12+01:00yes https://scholafly.com/lesson/ph01-04/2026-09-28https://scholafly.com/assets/thumbs/ph01-04.jpgSpeed, typical speeds and s = vtIn this video you'll learn about speed and typical speeds for GCSE Physics.https://www.youtube.com/embed/0WH03GLLWXo5972026-09-28T16:26:53+01:00yes https://scholafly.com/lesson/ph01-05/2026-09-28https://scholafly.com/assets/thumbs/ph01-05.jpgVelocityIn this video you'll learn about velocity for GCSE Physics.https://www.youtube.com/embed/ML5wmowRyYI4742026-09-28T20:41:35+01:00yes https://scholafly.com/lesson/ph01-06/2026-09-29https://scholafly.com/assets/thumbs/ph01-06.jpgMeasuring speed in the laboratoryIn this video you'll learn about measuring speed in the lab for GCSE Physics.https://www.youtube.com/embed/jyTHzVQk1qE4862026-09-29T13:08:36+01:00yes