Primary and complementary colours Animation Play

Properties of sodium, chlorine and sodium chlorides Chart Play

Reactions of complex ions Student activity Play

Reactions of complex ions Whiteboard exercise Play

Recognising oxidising agents Student activity Play

Recognising oxidising agents Simulation Play

Recognising reducing agents Simulation Play

Recognising reducing agents Student activity Play

Retina Student activity Play

Retina Whiteboard exercise Play

RGB matrix Whiteboard exercise Play

Rocks and minerals Student activity Play

Sedimentary rocks Student activity Play

Seeing colours Animation Play

Seeing colours Slideshow Play

Sensation; perception and activation thresholds Student activity Play

Sensation; perception and activation thresholds Slideshow Play

Soap bubble Animation Play

Sound Whiteboard presentation Play

Sound Class activity Play

Sound travel in gases and vacuum Simulation Play

Spectral classes Chart Play

Spontaneous and stimulated emission Student activity Play

Statements about dispersion of light Whiteboard exercise Play

Stellar radiation Student activity Play