The division of a triangle Student activity Play

The division of the triangle Whiteboard exercise Play

The goldfinch and the grouse Whiteboard exercise Play

The intensity of light Animation Play

The interior angles of a polygon Student activity Play

The maze Game Play

The missing decimal Whiteboard exercise Play

The missing exponent in a quotent Whiteboard exercise Play

The missing fraction Whiteboard exercise Play

The money spent by Lena Whiteboard exercise Play

The number of zeros Whiteboard exercise Play

The pieces of chocolate Whiteboard exercise Play

The pieces of chocolate on three plates Whiteboard exercise Play

The pieces of chocolate on two plates Whiteboard exercise Play

The power of 10 with a negative exponent Student activity Play

The power of 10 with a negative exponent Whiteboard exercise Play

The price of a cinema ticket Whiteboard exercise Play

The Professor's garden Animation Play

The ratio of the parts Student activity Play

The value of an algebraic fraction Animation Play

Theorems and their assumptions in algebra Student activity Play

Theorems and their assumptions in algebra Whiteboard exercise Play

Theorems and their assumptions in geometry Student activity Play

Transforming a fraction into a decimal Animation Play

Travelling Student activity Play