Acid dissociation constant for lactic acid Animation Play

Approximate values of the cosine function Simulation Play

Approximating surds Student activity Play

Area and circumference – calculation problems Whiteboard exercise Play

Area and circumference – calculation problems Student activity Play

Area of a circle Student activity Play

Area of a rectangle Whiteboard exercise Play

Areas of parallelograms Student activity Play

Areas of polygons made from trapeziums Whiteboard exercise Play

Areas of polygons made from trapeziums Student activity Play

Areas of polygons made of parallelograms Whiteboard exercise Play

Areas of polygons made of parallelograms Student activity Play

Areas of polygons made of triangles – problems Whiteboard exercise Play

Areas of polygons made of triangles – problems Student activity Play

Areas of rectangles – reminder Student activity Play

Arithmetic mean – the 'true' value of the data Student activity Play

Arithmetic mean – the 'true' value of the data Whiteboard exercise Play

Atomic spectrum of hydrogen Student activity Play

Average Animation Play

Balls in the boxes Whiteboard exercise Play

Base dissociation constant Kb (1) Student activity Play

Bigger or smaller Animation Play

Bigger or smaller Whiteboard exercise Play

Bigger or smaller Slideshow Play

Bigger or smaller Student activity Play