Pythagorean theorem in 3-dimensional space Whiteboard exercise Play

Pythagorean triples Student activity Play

Quartile coefficient of skewness Student activity Play

Quartiles and interquartile range Student activity Play

Radii of three circles Whiteboard exercise Play

Radioactive decay Student activity Play

Range Student activity Play

Ratio of two quantities of the same kind Student activity Play

Ratios of sides in a triangle Animation Play

Reach the star Game Play

Reflecting telescopes Animation Play

Reflecting telescopes Whiteboard exercise Play

Reflecting telescopes Student activity Play

Relationship between the electromagnetic force and the length of a conductor Slideshow Play

Relationship between the electromagnetic force and the length of a conductor Student activity Play

Relationship between the electromagnetic force and the length of a conductor Whiteboard exercise Play

Reliability of demonstration Animation Play

Resistance of a wire Animation Play

Resistance of a wire – a case study Student activity Play

Resonance Whiteboard exercise Play

Resonance Student activity Play

Resultant velocity Student activity Play

Resultant velocity Simulation Play

Right-angled triangle or not? Animation Play

Roots of roots – finding true equations Whiteboard exercise Play