A stationary source and a mobile observer Student activity Play

Acceleration Glossary Play

Acceleration Student activity Play

Acceleration – time graph Student activity Play

Acceleration – time graph Whiteboard exercise Play

Acid–base reactions in a non-aqueous medium Animation Play

Acquired or inherited traits? Student activity Play

Addition of hydrogen bromide to ethene Whiteboard exercise Play

Adjusting sharpness Whiteboard exercise Play

Adjusting sharpness Student activity Play

Air drag Class activity Play

Aluminium(III) salt in acidic, neutral and alkaline medium Whiteboard exercise Play

Angle bisector Student activity Play

Application of waves for communication Whiteboard presentation Play

Areas of rectangles Whiteboard presentation Play

Areas of rectangles Class activity Play

Atomic radius Student activity Play

Autonomic response to a change in the external environment Whiteboard exercise Play

Autonomic response to a change in the internal environment Whiteboard exercise Play

Average speed Animation Play

Bacterial count Whiteboard exercise Play

Bacterial culture on a solid medium Animation Play

Bacterial growth in a continuous culture Animation Play

Biofermenters Animation Play

Biofermenters Student activity Play