Maths
Number sense, practice, puzzles and full courses, from counting to the kind of maths a teenager meets at school.
Maths 24
Khan Academy
Free courses and practice from early maths through school and exam prep, with videos and mastery challenges. Science, computing and humanities sit here too.
Zearn
A nonprofit maths programme used in many schools, with on-screen lessons and practice. Families can also use it at home.
Prodigy Math
A fantasy game in which answering maths questions powers the battles. The game itself is free; a paid membership adds reports and extra items.
Bedtime Math
A daily maths story with questions at three difficulty levels, meant to be done together at the end of the day, plus a free app.
Free daily problems
Math Playground
Games, word problems and logic puzzles sorted by topic, widely used for short practice sessions.
XtraMath
A short daily programme for maths facts (addition through division), used at school and at home.
Desmos
A free graphing calculator and a library of classroom activities for algebra, geometry and statistics.
Free graphing calculator
GeoGebra
Interactive geometry, algebra and graphing tools, plus a large set of ready-made classroom activities.
Free to use
NRICH
Rich maths problems and articles from the University of Cambridge, for classrooms and for children who like a puzzle that doesn't give up at once.
Free problems
Youcubed
Tasks, films and advice from Stanford's Youcubed, aimed at building a more open, less fearful way of learning maths.
Free tasks
Mathigon
Interactive maths courses and tools (including Polypad) that treat courses like a tour rather than a worksheet.
Beast Academy
A comic-book maths curriculum from Art of Problem Solving, in print and online, for children who want a harder than usual path.
Art of Problem Solving
Textbooks, an online school and a large community for students who want challenge well beyond a standard textbook.
ST Math
A visual, puzzle-based maths programme from MIND Education, used mainly through schools, in which ideas are shown before they are named.
SplashLearn
Games and practice for maths and reading, with a free starting tier and a paid family plan for the full library.
IXL
A large practice site covering maths and other school subjects, sold mainly as a subscription to families and schools.
Coolmath4Kids
Lessons and games for primary maths, from the same people as Coolmath. The site carries advertising.
Arcademics
Fast, multiplayer practice games for maths facts and a few language skills, often used as a classroom warm-up.
Illustrative Mathematics
A full, openly available maths curriculum and task library used by many schools, with problem-based lessons.
Toy Theater
Simple on-screen manipulatives and short games for early maths, art and literacy, useful on an interactive board or a tablet.
Free to use
Maths Is Fun
Plain, illustrated explanations of maths ideas, from fractions to early calculus, with practice questions on many pages.
Free to read
Estimation 180
A bank of estimation challenges, each a photograph and a question, designed for a short daily classroom routine.
Free tasks
Open Middle
Problems with a closed end and an open middle: many ways to reach a right answer, sorted by grade and standard.
Free problems
Which One Doesn't Belong
Sets of four pictures or numbers in which any one can be the odd one out, if you can say why. Built for talk, not for a single right answer.
Free prompts
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