Algebraic solutions Student activity Play

Alkanes and cycloalkanes Whiteboard presentation Play

Alkanes and cycloalkanes Class activity Play

Allotropes of carbon Animation Play

Amino acids Whiteboard presentation Play

Amino acids Class activity Play

Amorphous solids Student activity Play

An angle and points on the circle Whiteboard exercise Play

An angle and points on the circle Student activity Play

An enlargement Simulation Play

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

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

Arithmetic sequence Class activity Play