Rectangles Student activity Play

Reflection of light Whiteboard presentation Play

Reflection of light Class activity Play

Reflection symmetry in the coordinate system in the x-axis and the y-axis Student activity Play

Relationship between the group number and the number of valence electrons Animation Play

Relative atomic mass Whiteboard presentation Play

Relative atomic mass Class activity Play

Relatively prime numbers Whiteboard exercise Play

Reversing the percentage change Student activity Play

Rolling 6 Animation Play

Rolling a die Animation Play

Rolling a die Whiteboard exercise Play

Rolling a number greater than or equal to 7 Whiteboard exercise Play

Rolling an odd number Whiteboard exercise Play

Rounding a number Animation Play

Rounding decimals Whiteboard exercise Play

Rounding decimals Student activity Play

Rounding decimals to 0.01 Student activity Play

Rounding decimals to 0.1 Student activity Play

Rounding decimals to a whole number Animation Play

Rounding decimals to a whole number Student activity Play

Rounding decimals to the nearest 0.01 Whiteboard exercise Play

Rounding decimals to the nearest 0.1 – penguins Whiteboard exercise Play

Rounding decimals to the nearest whole number Whiteboard exercise Play

Rounding large numbers Whiteboard exercise Play