Describing data – mean, median, mode Student activity Play

Describing functions in words Student activity Play

Describing position Whiteboard exercise Play

Describing position Animation Play

Describing position in a plane Whiteboard exercise Play

Describing position on the city plan Whiteboard exercise Play

Describing position – part 1 Student activity Play

Describing position – part 2 Student activity Play

Determination of the number of erythrocytes Animation Play

Determining the empirical formula Animation Play

Determining the number of bacteria in a sample Animation Play

Determining the proportions of matter in the ecological pyramid Animation Play

Diagonals of polygons Student activity Play

Difference of squares Student activity Play

Different questions Whiteboard exercise Play

Different questions about the same operation Whiteboard exercise Play

Different questions about the same operation. How many times more? How many times less? Student activity Play

Different questions about the same operation. How much more? How much less? Student activity Play

Different ways of proving Animation Play

Different ways of proving – example as a proof Whiteboard exercise Play

Disorders related to abnormalities in the number of sex chromosomes Slideshow Play

Divers Simulation Play

Dividing by a decimal using the written method Whiteboard exercise Play

Dividing by a decimal using the written method Student activity Play

Dividing natural numbers Student activity Play