The tetrahedron Whiteboard exercise Play

The  nth term of an arithmetic progression Whiteboard exercise Play

The  nth term rule for the geometric sequence Whiteboard exercise Play

Triangular numbers Whiteboard exercise Play

Triangular numbers Student activity Play

Using a trick Animation Play

Using a trick in finding roots Student activity Play

Using arithmetic series to identify the sequence Whiteboard exercise Play

Using the nth term rule Whiteboard exercise Play

Using the nth term rule Student activity Play

Using the nth term rule for a geometric sequence Student activity Play

Values of the sine and the cosine Animation Play

Visualisation of squaring a binomial sum Animation Play

What is the nth term of a sequence? Whiteboard exercise Play

Which term of the sequence is it? Whiteboard exercise Play

Which term of the sequence is it? Student activity Play

Writing the formula for the nth term of a sequence Student activity Play

Writing the formula for the nth term of a sequence Whiteboard exercise Play

Zeno's paradox Animation Play