Two mirrors Animation Play

Two mirrors Animation Play

Two points on the shoreline Animation Play

Two right-angled triangles Whiteboard exercise Play

Two vectors and the angle between them Whiteboard exercise Play

Types of angles Animation Play

Unknown angle in a triangle Animation Play

Use of a calculator Class activity Play

Use of a calculator Whiteboard presentation Play

Uses of periscopes Illustration Play

Using tangent theorems Student activity Play

Using the basic constructions Student activity Play

Using the calculator to solve trigonometric equations Animation Play

Valence Student activity Play

Valence Whiteboard exercise Play

Valence bond theory Whiteboard exercise Play

Valence bond theory (1) Student activity Play

Valence bond theory (2) Student activity Play

Valence bond theory and hybridisation Whiteboard presentation Play

Valence bond theory and hybridisation Class activity Play

Valence bond theory limitations Animation Play

Valence electrons Animation Play

Valence of a polyatomic ion Illustration Play

Valence of elements in covalent compounds Animation Play

Valence of elements in ionic compounds Animation Play