Free maths tools
Interactive maths tools
Some things in maths only make sense once you watch them move. Drag the sliders, grab the points, and see what the formula was describing all along.
Every tool here is free, needs no account, and works on a phone. They are built around the ideas students get stuck on most, and each one shows the working rather than just the answer.
- Ages 13 to 15Binomial squaresSee (a+b)², (a-b)² and a²-b² as areas, and why that 2ab is really there.→
- Ages 13 to 15Pythagoras theoremDrag the triangle and watch the two small squares always fill the big one.→
- Ages 14 to 16Discriminant and parabolaSlide a, b and c and see D decide whether the parabola cuts, touches or misses the axis.→
- Ages 14 to 18Unit circleDrag the angle and see sin, cos and tan as lengths, with the exact values.→
- Ages 16 to 18Derivative and tangentDrag the point and watch the tangent tilt, with the secant closing in on it.→
- Ages 17 to 18Integral and Riemann sumPush the rectangle count up and watch the sum close in on the exact area.→
- Ages 16 to 18Normal distributionDrag the bounds across the bell curve and read probability and z-scores straight off.→
Teachers, use these freely
You are welcome to use these in class, project them, or link to them from your school site. No account, no ads, nothing to install. A link back is appreciated but never required.
Want someone to walk through it with you?
Book a 1-on-1 lesson with a verified maths tutor, whenever it suits you.