Radioactivity Student activity Play

Raising 10 to a negative integer Whiteboard exercise Play

Raising 10 to a positive integer Whiteboard exercise Play

Raising 10 to an integer Animation Play

Random integer numbers Whiteboard exercise Play

Random sampling using a calculator Student activity Play

Random sampling using a calculator Animation Play

Reactions between halogens and metals Student activity Play

Reactions occurring at the electrodes Student activity Play

Rectangles Student activity Play

Reduction formulas for the cosine Animation Play

Reduction formulas for the sine Animation Play

Roots of roots – finding true equations Whiteboard exercise Play

Roots of roots – more examples of true or false equations Whiteboard exercise Play

Rounding decimals Whiteboard exercise Play

Rounding decimals to 0.1 or to 0.01 Animation Play

Rounding decimals to 10–1 or to 10–2 Student activity Play

Rounding large numbers Whiteboard exercise Play

Run for a place value! – a game Game Play

Sequences and fractions Student activity Play

Sequences of numbers Student activity Play

Sets and subsets Student activity Play

Sets and subsets Whiteboard exercise Play

Sewing a jacket and trousers Whiteboard exercise Play

Sewing clothes Whiteboard exercise Play