Radioactivity Student activity Play

Raising 10 to a negative integer Whiteboard exercise Play

Raising 10 to a positive integer Whiteboard exercise Play

Range Student activity Play

Range of trigonometric functions Whiteboard exercise Play

Range of trigonometric functions Student activity Play

Rate equation and order of reaction Student activity Play

Reactions between halogens and metals Student activity Play

Reactions involving phase changes Animation Play

Reactions occurring at the electrodes Student activity Play

Reading out the type of skewness from the five-number summary Animation Play

Reading out the value from the cumulative frequency polygon Whiteboard exercise Play

Reading out the value of x from the picture Whiteboard exercise Play

Reading the rounded value of the square root Animation Play

Reduction formulas due to periodicity Whiteboard exercise Play

Reduction formulas due to periodicity Student activity Play

Reduction formulas for the cosine Animation Play

Reduction formulas for the sine Animation Play

Relationship between Kp and Kc Student activity Play

Relative mass and charge Animation 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