Building a demonstration from a proof Student activity Play

Building a demonstration from a proof Whiteboard exercise Play

Building a proof from a demonstration Whiteboard exercise Play

Building a proof from a demonstration Student activity Play

Constructing a proof from a demonstration Whiteboard exercise Play

Constructing a proof from a demonstration Student activity Play

Demonstration of a theorem Animation Play

Demonstration of the formula for the area of a triangle Whiteboard exercise Play

Demonstration or proof? Animation Play

Demonstration or proof? Student activity Play

Is a practical demonstration reliable? Whiteboard exercise Play

Is a practical demonstration reliable? Student activity Play

Proof and demonstration of a theorem Animation Play

Proof and demonstration of the formula for the area of a triangle Student activity Play

Reading out the value of x from the picture Whiteboard exercise Play

Reliability of demonstration Animation Play

Sum of all positive integers from 1 to n Animation Play

The area of a triangle Animation Play

The sum of a positive number and its reciprocal Animation Play

Understanding the theorem Class activity Play

Understanding the theorem Whiteboard presentation Play