An image formed by a concave mirror Animation Play

An object brought closer to the focal point Animation Play

An object brought closer to the mirror Animation Play

Angle bisector Student activity Play

Angles around a point Whiteboard exercise Play

Angles around a point Student activity 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

Apical and lateral meristems Student activity Play

Apical and lateral meristems Illustration 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

Bacterial growth Whiteboard presentation Play

Bacterial growth Class activity Play

Bacterial growth curve Animation Play

Bacterial growth curve Illustration Play

Bacterial growth in a batch culture Animation Play

Bacterial growth in a continuous culture Animation Play

Balancing point Animation Play