Stating a problem and collecting data Whiteboard exercise Play

Stemplot Student activity Play

Substituting into formulas connected with a right-angled triangle Student activity Play

Substituting into formulas connected with any triangle Student activity Play

Substituting into formulas connected with triangles Whiteboard exercise Play

Subtracting decimals using the written method Student activity Play

Subtracting natural numbers using the written method Student activity Play

Surface area of a cylinder Student activity Play

Surface areas of some solids Student activity Play

Tangents to a circle Student activity Play

The area and the height of the rhombus Whiteboard exercise Play

The area of a parallelogram Student activity Play

The area of a parallelogram Student activity Play

The area of a parallelogram Animation Play

The area of a parallelogram Whiteboard exercise Play

The area of a trapezium Student activity Play

The area of a trapezium Animation Play

The area of a triangle Animation Play

The area of a triangle Student activity Play

The area of a triangle Animation Play

The area of a triangle Animation Play

The area of a triangle Student activity Play

The area of a triangle in a coordinate system Whiteboard exercise Play

The area of the rhombus Whiteboard exercise Play

The arithmetic mean for continuous data Student activity Play