Decimals and fractions Class activity Play

Deduction Student activity Play

Deduction Whiteboard exercise Play

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

Designing experiments Student activity Play

Designing experiments Whiteboard exercise Play

Determination of the number of erythrocytes Animation Play

Determining the electron configuration of carbon Animation Play

Determining the electron configuration on the basis of the periodic table Student activity Play

Determining the empirical formula Animation Play

Determining the formula of a compound knowing the valence of its elements Student activity 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 the Local Group Illustration 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