Alpha decay Animation Play

An exam Whiteboard exercise Play

An exam Student activity Play

An example of a proof Student activity Play

An image in a mirror Simulation Play

An image in a mirror Student activity Play

An interesting number Whiteboard exercise Play

An interesting number Student activity Play

Anomalies in the number of sex chromosomes Illustration Play

Application of graphs Animation Play

Application of Harry's formula Whiteboard exercise Play

Applying the trapezium rule for a different number of sub-intervals Whiteboard exercise Play

Approximating irrational numbers Student activity Play

Approximating square root of three Whiteboard exercise Play

Approximating square root of two Whiteboard exercise Play

Approximating surds Animation Play

Approximating surds Student activity Play

Approximation error and the number of sub-intervals Simulation Play

Approximation of the number e Whiteboard exercise Play

Approximations of irrational numbers Whiteboard exercise Play

Approximations of irrational numbers Student activity Play

Arithmetic mean Animation Play

Arithmetic mean – 'balancing point' of the data Student activity Play

Arrangements Student activity Play

Assigning electrons to atomic orbitals Student activity Play