Math Simulations
Drag it, stretch it, see why it works. Free interactive simulations that show the reason behind a math rule, not just the rule. Ready for the classroom board, Chromebooks and tablets.
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NEW Area Formulas Cut, slide and turn: where b × h, ½bh and ½(a + b)h come from Grade 6 Play free -
NEW Odd Numbers Make Squares 1 + 3 + 5 + 7 …: each odd number wraps an L around a square Grades 4–7 Play free -
NEW Galton Board 1,000 balls, left or right at every peg: a bell curve appears Grades 6–8 Play free -
NEW Fibonacci Spiral 1, 1, 2, 3, 5, 8: squares build the golden spiral Grades 4–8 Play free -
NEW Sieve of Eratosthenes Cross out the 2s, 3s, 5s and 7s: the primes are left Grades 4–6 Play free -
NEW Times-Table Circles Join each number to its double: hearts and flowers appear Grades 3–8 Play free -
NEW × 10 and ÷ 10 The digits slide, the decimal point stays put Grades 4–5 Play free -
NEW Where Does π Come From? Roll a circle one turn and measure it with its diameter: 3 and a bit Grades 6–8 Play free -
NEW Area Model Multiplication Split 23 × 14 into tens and ones, multiply the parts, add them up Grades 3–5 Play free -
NEW Completing the Square Split, move and fill the corner: x² + bx = (x + b/2)² − (b/2)² Grades 9–10 Play free -
NEW Rounding Board Click a number and watch it roll to the nearest ten, hundred, whole or tenth Grades 3–6 Play free -
NEW Square of a Difference Take two strips away to see why (a − b)² = a² − 2ab + b² Grades 8–9 Play free -
NEW Difference of Squares Cut and move to see why a² − b² = (a + b)(a − b) Grades 8–9 Play free -
NEW Square of a Sum See why (a + b)² = a² + 2ab + b² Grades 8–9 Play free -
NEW Dice Sums Roll two dice 1,000 times and see why 7 wins Grades 5–7 Play free -
NEW Fraction Bars Shade, compare and split bars to find equal fractions Grades 2–5 Play free -
NEW Rounding Hill Roll the ball to the nearest ten or hundred Grades 3–5 Play free -
NEW Pythagorean Theorem Slide four triangles to prove a² + b² = c² Grades 7–8 Play free -
NEW Circle Area Unroll a circle into a rectangle to see why A = πr² Grades 6–8 Play free -
NEW Triangle Angles Tear off the corners to see they make 180° Grades 4–7 Play free -
NEW Area vs. Perimeter Stretch a rectangle and count squares and edges Grades 3–5 Play free
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How it works
Every simulation is free and runs in any browser, with no logins. Open one on the classroom board to explore together, or share the link so students can drag, stretch and test their own ideas.
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