Rate at which work is done Student activity Play

Reaction of iron(III) chloride with potassium iodide Animation Play

Reactions of commercially available galvanic cells Slideshow Play

Reciprocal of irrational numbers Whiteboard exercise Play

Roentgen's experiment Animation Play

Root of any order as a power Student activity Play

Root of any order as a power Whiteboard exercise Play

Roots and the index law for the power of a power Animation Play

Roots as powers Student activity Play

Roots as powers Whiteboard exercise Play

Roots of roots – finding true equations Whiteboard exercise Play

Roots of roots – more examples of true or false equations Whiteboard exercise Play

Rounding decimals Whiteboard exercise Play

Rounding decimals to 0.1 or to 0.01 Animation Play

Rounding decimals to 10–1 or to 10–2 Student activity Play

Rounding to the nearest power of 10 Whiteboard exercise Play

Scientific notation – remedial Animation Play

Short-sightedness and long-sightedness Whiteboard exercise Play

Sight defects Student activity Play

Simulation Student activity Play

Size of electric current Student activity Play

Size of electric current Animation Play

Size of electric current Whiteboard exercise Play

Solar energy Animation Play

Solar energy Whiteboard exercise Play