Visual angle Whiteboard exercise Play

Visualisation of squaring a binomial sum Animation Play

Wave refraction Student activity Play

Wave refraction Animation Play

Wave refraction Whiteboard exercise Play

What affects refraction? Student activity Play

What affects refraction? Simulation Play

What affects refraction? Whiteboard exercise Play

What does the magnitude of work done depend on? Student activity Play

What is a perimeter? Animation Play

What is a perimeter? Student activity Play

What is the critical angle of a given medium? Animation Play

When is a theorem false? The counterexample Student activity Play

When the Lorentz force is not acting Simulation Play

When the Lorentz force is not acting Student activity Play

Why are they sums? Animation Play

Work and the time necessary to perform it – part 1 Student activity Play

Write the sum using powers of 10 Student activity Play

Write the sum. Place value Whiteboard exercise Play

Write the sum. Place value Student activity Play

Writing in the form of algebraic expression Whiteboard exercise Play

Writing numbers as the sum of powers of 10 Whiteboard exercise Play

Writing on the computer Animation Play

Writing the sum using powers of 10 Animation Play

Wrong steps in reasoning Student activity Play