The values of the derivative of the square root of  x Whiteboard exercise Play

The vertex of a parabola Student activity Play

Theorem – assumptions and claim Whiteboard exercise Play

Theorem – assumptions and claim Student activity Play

Tour to Descartes Animation Play

Traces of 3-D shapes Student activity Play

Traces of 3-D shapes Animation Play

Triangles and squares in coordinates Whiteboard exercise Play

Triangular and square numbers Class activity Play

Triangular and square numbers Student activity Play

Triangular and square numbers Whiteboard presentation Play

Triangular and square numbers Animation Play

Two more quadrilaterals Student activity Play

Use of a calculator Whiteboard presentation Play

Use of a calculator Class activity Play

Use of the Punnett square Student activity Play

Using algebraic expressions Student activity Play

Using ITC in calculations Whiteboard presentation Play

Using ITC in calculations Class activity Play

Using the formula for square of a difference Simulation Play

Using the least squares method Animation Play

Variance Student activity Play

Venn diagrams Whiteboard exercise Play

Venn diagrams Student activity Play

Visualisation of squaring a binomial difference Animation Play