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

Diagram of a series Animation Play

Diagrams of geometric sequences and series 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

Distance between points in 3-dimensional space Whiteboard exercise Play

Distance formula in 3-dimensional space 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 Student activity Play