Proportions in crossing lines cut by two parallel lines Student activity Play

Proton cycle Animation Play

Proton cycle Whiteboard exercise Play

Pythagorean theorem Whiteboard presentation Play

Pythagorean theorem Class activity Play

Quadrilaterals Student activity Play

Quadrilaterals Whiteboard exercise Play

Quadrilaterals Student activity Play

Quadrilaterals – reminder Animation Play

Rate equation and order of reaction Whiteboard exercise Play

Rate equation and order of reaction Student activity Play

Ratios in paper sizes Animation Play

Ratios of sides in a triangle Animation Play

Reactants and products of a reaction Animation Play

Reactants' concentration and the reaction rate Animation Play

Reacting quantities Whiteboard exercise Play

Reacting quantities Student activity Play

Reaction between alkenes and bromine water Animation Play

Reaction between an acid and a metal Animation Play

Reaction between benzene and ethanoyl chloride Whiteboard exercise Play

Reaction between bromine or iodine and hydrogen Animation Play

Reaction between chlorine and hydrogen Animation Play

Reaction between copper and nitric(V) acid Animation Play

Reaction between copper sulphate and sodium hydroxide Animation Play

Reaction between fluorine and hydrogen Animation Play