An object brought closer to the mirror Animation Play

Angle bisector Student activity Play

Angles around a point Student activity Play

Angles around a point Whiteboard exercise Play

Angles in a circle Whiteboard exercise Play

Angles in a circle Student activity Play

Angles on a straight line and angles round a point Student activity Play

Area under enlargement – a heptagon Whiteboard exercise Play

Areas of images of figures under enlargement Student activity Play

Arithmetic mean Animation Play

Arithmetic mean – 'balancing point' of the data Student activity Play

Arithmetic mean – 'balancing point' of the data Whiteboard exercise Play

Attraction between point masses and homogeneous balls Whiteboard exercise Play

Attraction between point masses and homogeneous balls Student activity Play

Balancing point Animation Play

Blot and symmetry Animation Play

Boiling and boiling point Student activity Play

Boiling and boiling point Whiteboard exercise Play

Boiling point Animation Play

Boiling point Student activity Play

Boiling point and external pressure Animation Play

Boiling point of alkanes Simulation Play

Boiling point of alkanes Student activity Play

Boiling points of hydrides Animation Play

Boiling points of straight-chain alkanes and cycloalkanes Animation Play