Decomposition of calcium carbonate – a kinetic study Whiteboard exercise Play

Decomposition of hydrogen peroxide Animation Play

Decomposition of vectors Student activity Play

Decomposition of vectors Whiteboard exercise Play

Decomposition reaction Slideshow Play

Decompression sickness Slideshow Play

Deduction Student activity Play

Deduction Whiteboard exercise Play

Deductions for algebraic transformations Student activity Play

Deductions for algebraic transformations 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

Defectoscopy and the measurement of thickness Student activity Play

Defectoscopy and the measurement of thickness Whiteboard exercise Play

Defectoscopy and the measurement of thickness Whiteboard exercise Play

Defence mechanisms in plants Slideshow Play

Deficiency of macro-elements Whiteboard exercise Play

Definition of a central angle Animation Play

Definition of an inscribed angle Animation Play

Definition of antisepsis Student activity Play

Definition of antisepsis Whiteboard exercise Play

Definition of enlargement Student activity Play

Definition of the metre Animation Play

Deletion Animation Play

Democritus' and Dalton's atomic theories Student activity Play

Demonstration of a theorem Animation Play

Demonstration of the formula for the area of a triangle Whiteboard exercise Play

Demonstration or proof? Student activity Play