Discrete variables Slideshow Play

Dispersion forces (London forces) Student activity Play

Distance Animation Play

Dot plot Student activity Play

Dot plot – earthquakes in Switzeland Simulation Play

Dot plot – graphical representation of variables Whiteboard exercise Play

'Double quadratic' equations Student activity Play

Employment lay-offs Student activity Play

Encoding numbers Student activity Play

Entropy Student activity Play

Equally likely elementary events Student activity Play

Equally likely events Animation Play

Equally likely events Slideshow Play

Equally likely events – a bag containing four cubes Whiteboard exercise Play

Equally likely outcomes Whiteboard exercise Play

Equally likely outcomes Student activity Play

Equations in two variables Student activity Play

Equations in two variables Whiteboard exercise Play

Equations with one variable Student activity Play

Equations with one variable Whiteboard exercise Play

Equations with separable variables Whiteboard presentation Play

Equations with separable variables Class activity Play

Equations with  cos(ax) Student activity Play

Events Student activity Play

Example of introducing a new variable Animation Play