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

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

Distance – a more difficult problem Whiteboard exercise Play

Distance – a more difficult problem Student activity Play

Dividing by a decimal using the written method Student activity Play

Dividing by a decimal using the written method Whiteboard exercise Play

Dividing natural numbers Student activity Play

Dividing powers of 10 Student activity Play

Dividing surds Student activity Play

Dividing using the written method Animation Play

Divisibility Whiteboard presentation Play

Divisibility Class activity Play

Divisibility Student activity Play

Divisibility Whiteboard exercise Play

Divisibility by 11 Student activity Play

Divisibility by 11 Whiteboard exercise Play