Pythagoras' theorem – geometric proof Whiteboard exercise Play

Pythagoras' theorem – geometric proof Student activity Play

Pythagorean theorem in 3-dimensional space Student activity Play

Quadrilaterals Whiteboard exercise Play

Quadrilaterals Student activity Play

Quadrilaterals Whiteboard exercise Play

Quadrilaterals and their properties Class activity Play

Quadrilaterals and their properties Whiteboard presentation Play

Quadrilaterals – reminder Animation Play

Quadrilaterals – squares and rectangles Student activity Play

Radio waves Student activity Play

Rational numbers Whiteboard exercise Play

Rationalising the denominator Student activity Play

Rationalising the denominator Whiteboard exercise Play

Ratios in paper sizes Animation Play

Ratios of squares Animation Play

Reaction of ammonia with water Animation Play

Reaction of ethanoic acid with water Animation Play

Reaction of metal ions with alkalis Student activity Play

Reaction with sodium hydroxide Animation Play

Reactions between Group 1 and 2 metals and water Student activity Play

Reactions of acids and bases Whiteboard presentation Play

Reactions of acids and bases Class activity Play

Reactions of amides Student activity Play

Reading from graphs Student activity Play