Ruler-and-compass constructions Class activity Play

Ruler-and-compass constructions, locus (1) Whiteboard presentation Play

Ruler-and-compass constructions, locus (1) Class activity Play

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

Ruler-and-compass constructions, locus (2) Whiteboard presentation Play

Rusting of steel Slideshow Play

Silver halides in photography Student activity Play

Some uses of aluminium Slideshow Play

Specific heat capacities of selected materials Slideshow Play

Specific heat capacity Student activity Play

Spring barometer Animation Play

Starch – the storage material Slideshow Play

Statements about solids Whiteboard exercise Play

Sulphur dioxide and acid rain 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 amount of genetic material in the gametes Animation 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