DC supply Whiteboard exercise Play

Deductive reasoning Class activity Play

Deductive reasoning Whiteboard presentation Play

Deductive reasoning and Venn diagrams Student activity Play

Deductive reasoning and Venn diagrams Whiteboard exercise Play

Density and the molecular structure of matter Chart Play

Density and the molecular structure of matter Student activity Play

Describing data – mean, median, mode Student activity Play

Describing the graph Whiteboard exercise Play

Diagram of a series Animation Play

Diagram of igneous rock formation Whiteboard exercise Play

Diagram of parthenogenesis in aphids Illustration Play

Diagram of protein synthesis in the organism Illustration Play

Diagram of reproduction by division in starfish Illustration Play

Diagram of the Local Group Illustration Play

Diagram of the Van de Graaff generator Whiteboard exercise Play

Discontinuous variation Student activity Play

Drawing a graph of a linear function Animation Play

Drawing tree diagram Whiteboard exercise Play

Effect of physical activity on blood flow through the organs; cardiac output and stroke volume Student activity Play

Electron spin. Pauli's exclusion principle Student activity Play

Elementary events diagram Animation Play

Energy diagram Animation Play

Energy flow and food chains Student activity Play

Energy flow and matter circulation Student activity Play