The sign graph method Animation Play

The sign of the derivative of the reciprocal of  x Whiteboard exercise Play

The signs of the trigonometric functions Student activity Play

The signs of trigonometric functions Whiteboard exercise Play

The signs of trigonometric functions – clockwise turn Whiteboard exercise Play

The simpler way to write algebraic expressions Whiteboard exercise Play

The sine – reducing angles Student activity Play

The sine – reducing angles Whiteboard exercise Play

The swimming pool Whiteboard exercise Play

The test-point method – activities Whiteboard exercise Play

The value of the expression Whiteboard exercise Play

The volume in litres Whiteboard exercise Play

The water in the aquarium Whiteboard exercise Play

Thermometer Whiteboard exercise Play

Three bottles Whiteboard exercise Play

Trigonometric functions and their signs Animation Play

TV screens Whiteboard exercise Play

Using the diagrams in real life Whiteboard exercise Play

Weight Class activity Play

When a function changes sign Student activity Play

Why are negative numbers necessary? Student activity Play

Working with functions Class activity Play

Working with functions Whiteboard presentation Play

Writing in the form of algebraic expression Whiteboard exercise Play

Zeros of a function Whiteboard presentation Play