The circumcentre of a triangle Whiteboard exercise Play

The correlation coefficient Animation Play

The correlation coefficient Student activity Play

The derivative Class activity Play

The derivative Whiteboard presentation Play

The derivative of the simplest cubic function Student activity Play

The derivative of the simplest quadratic function Student activity Play

The derivative of the simplest quadratic function Whiteboard exercise Play

The derivative of the simplest quadratic function Simulation Play

The effects of osmosis on the rate of transpiration Student activity Play

The equation of a line going through two points Student activity Play

The equation of the tangent Student activity Play

The equation of the tangent Animation Play

The family of lines Student activity Play

The family of lines y = 2x + c Animation Play

The formula and the graph Student activity Play

The general form of the equation of a straight line Student activity Play

The gradient and the y-intercept of a straight line Whiteboard exercise Play

The gradient and the equation of a tangent Student activity Play

The gradient and the intercept Whiteboard exercise Play

The gradient and the intercept Whiteboard exercise Play

The gradient function Student activity Play

The gradient function Whiteboard exercise Play

The gradient of a curve Animation Play

The gradient of a curve Student activity Play