A symmetrical triangle on squared paper Student activity Play

A symmetrical triangle on squared paper Whiteboard exercise Play

An interesting result Student activity Play

Coefficients read from Pascal's triangle Animation Play

Inverse square proportion Student activity Play

Inverse square proportion Whiteboard exercise Play

Multiplication shortcuts Student activity Play

Pascal's triangle Student activity Play

Poisoned apples Animation Play

Squared spiral Animation Play

Squaring a binomial sum Student activity Play

Squaring a binomial sum Whiteboard exercise Play

Squaring a number Student activity Play

Squaring large numbers Animation Play

The derivative of the reciprocal of x squared Student activity Play

Visualisation of squaring a binomial sum Animation Play

When is a theorem false? Animation Play

When is a theorem false? The counterexample Student activity Play