Ratio of two quantities of the same kind Simulation Play

Ratio of two quantities of the same kind Student activity Play

Reaction conditions and enthalpy change Slideshow Play

Reactions involving phase changes Animation Play

Reading from graphs Whiteboard exercise Play

Reading from graphs Student activity Play

Recent changes in the Earth's temperature Slideshow Play

Recognising reducing agents Simulation Play

Recognising reducing agents Student activity Play

Recombination in bacteria Animation Play

Recurring quotient Student activity Play

Refraction of light Student activity Play

Remainder of division Animation Play

Remainder theorem – proof Animation Play

Repeated percentage change Class activity Play

Repeated percentage change Whiteboard presentation Play

Reversing the percentage change Whiteboard exercise Play

Reversing the percentage change Student activity Play

Russian peasant multiplication Animation Play

Rutherford's experiment Animation Play

Slope of a line Student activity Play

Solid-liquid phase change Whiteboard exercise Play

Solid-liquid phase change Student activity Play

Solubility Animation Play

Solving problems involving percentages Whiteboard presentation Play