Property of similarity with scale – the areas of similar figures Whiteboard exercise Play

Proportions Student activity Play

Proportions – more difficult problems Student activity Play

Proteins – sample foods Slideshow Play

Pythagoras' theorem – geometric proof Student activity Play

Quadratic equation Student activity Play

Quadratic equation – example Animation Play

Radio waves Student activity Play

Radioactive decay Whiteboard exercise Play

Radioactive decay Student activity Play

Radioactive decay of Krypton-91 Whiteboard exercise Play

Random sampling Whiteboard exercise Play

Random sampling using a calculator Student activity Play

Reaction of potassium manganate(VII) with hydrogen peroxide Animation Play

Reactions between Period 3 elements and water Whiteboard exercise Play

Reactions between Period 3 elements and water (2) Student activity Play

Recognizing the pressure equation Whiteboard exercise Play

Reflecting telescopes Animation Play

Reflecting telescopes Student activity Play

Regular pentagon Animation Play

Relationship between the force of friction and the surface area Animation Play

Reliability of demonstration Animation Play

Renovation Whiteboard exercise Play

Representing a quadratic function in vertex form using the discriminant Student activity Play

Right-angled triangle or not? Animation Play