The sum to n terms of an arithmetic progression Student activity Play

The tangent as a coordinate Animation Play

The tangent of an arbitrary angle Student activity Play

The volume of a one-base spherical segment Whiteboard exercise Play

The volume of a one-base spherical segment Student activity Play

Three circles Student activity Play

Three circles – finding the arcs Whiteboard exercise Play

Triangular numbers Animation Play

Triangular numbers Student activity Play

Trisecting an angle Animation Play

Two circles Whiteboard exercise Play

Two circles Student activity Play

Two segments Whiteboard exercise Play

Types of display devices Slideshow Play

Types of waves Animation Play

Using a bisection method Student activity Play

Using the basic constructions Student activity Play

Volumes of revolution Whiteboard presentation Play

Volumes of revolution Class activity Play

Volumes of the encyclopaedia on the shelf Whiteboard exercise Play

Wave pulse and a mechanical wave Student activity Play

Wave pulse and a mechanical wave Whiteboard exercise Play

Welcome to Flatland Student activity Play

Welcome to Flatland Animation Play