The square of a difference Animation Play

The steepest part of a road Animation Play

The sum and difference of functions Student activity Play

The sum and difference of functions Whiteboard exercise Play

The sum and difference of trigonometric functions Whiteboard exercise Play

The sum and the difference of irrational numbers Whiteboard exercise Play

The two square tables Whiteboard exercise Play

Tickets Animation Play

Total energy Student activity Play

Trigonometric functions of the sum and difference of angles (1) Whiteboard presentation Play

Trigonometric functions of the sum and difference of angles (1) Class activity Play

Trigonometric functions of the sum and difference of angles (2) Whiteboard presentation Play

Trigonometric functions of the sum and difference of angles (2) Class activity Play

Updating a spreadsheet Student activity Play

Updating a spreadsheet Whiteboard exercise Play

Using the difference identity for the tangent Whiteboard exercise Play

Using the formula for square of a difference Simulation Play

Using the least squares method Animation Play

Using the sum and difference identities for the sine and cosine Whiteboard exercise Play

Value of the difference of polynomials Simulation Play

Value of the difference of polynomials Simulation Play

Visualisation of squaring a binomial difference Animation Play

Voltage Whiteboard exercise Play

Voltage Whiteboard exercise Play

Voltage Student activity Play