Ruler-and-compass constructions, locus (2) Class activity Play

Rusting of steel Slideshow Play

Solving problems involving quadratic equations (1) Whiteboard presentation Play

Solving problems involving quadratic equations (1) Class activity Play

Some uses of aluminium Slideshow Play

Spring barometer Animation Play

Stereoisomerism: geometric isomers Whiteboard exercise Play

Stereoisomerism: geometric isomers Student activity Play

Sum of the consecutive terms of a geometric progression Whiteboard exercise Play

Sum of the consecutive terms of a geometric progression Whiteboard exercise Play

Sum of the consecutive terms of a geometric progression Whiteboard exercise Play

Sum of the consecutive terms of a geometric progression Student activity 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 complex structure of matter Animation 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 definition of a geometric sequence Student activity Play

The definition of a geometric sequence Whiteboard exercise Play