Spring barometer Animation Play

Symmetry in a circle Student activity Play

Tangent to a circle Student activity Play

Tangent to a circle through a point not on the circle Student activity Play

Tangents Student activity Play

The bisector of a line Student activity Play

The cone Student activity Play

The construction of a bridge Animation Play

The construction of the roof Whiteboard exercise Play

The correctness of a construction Animation Play

The correctness of a construction Student activity Play

The five-number summaries for hourly paid and salaried employees Student activity Play

The five-number summaries for hourly paid employees Whiteboard exercise Play

The line and the circle Student activity Play

The measurement of pressure Student activity Play

The method of 'halving the arcs' Whiteboard exercise Play

The perpendicular bisector Student activity Play

The perpendicular bisector of a line segment – a reminder Student activity Play

The principle of construction of high walls Animation Play

The principle of crane construction Animation Play

The principle of mast construction Animation Play

The reasons for using circles Animation Play

The resolution of forces in a crane Simulation Play

The sine rule and construction of a triangle Animation Play

The stem-and-leaf diagram for years of experience Whiteboard exercise Play