Reading speed from the graph Student activity Play

Reading the graph Student activity Play

Reflecting telescopes Animation Play

Reflecting telescopes Student activity Play

Refraction of plane waves Student activity Play

Refraction of plane waves Whiteboard exercise Play

Regular polygons – the equilateral triangle Student activity Play

Relationship between distance and time Animation Play

Road signs Animation Play

Roemer's proof Student activity Play

Rolling and rotations Student activity Play

Roots of a polynomial Student activity Play

Rounding a number Animation Play

Satellite television Slideshow Play

Satellite television Student activity Play

Ships Animation Play

Short-sightedness Animation Play

Sides of a line Whiteboard exercise Play

Sides of a line Student activity Play

Sight defects Student activity Play

Sight defects Student activity Play

Sight defects Simulation Play

Small steps Class activity Play

Small steps Whiteboard presentation Play

Solution of the equation ax 2 + bx = 0 Student activity Play