Adding and subtracting negative numbers – the water level Whiteboard exercise Play

Addition of elements to alkenes Student activity Play

Addition of strong base to an ammonium buffer Animation Play

Addition of water to alkenes Animation Play

Addition of water to alkenes Student activity Play

Addition polymers and condensation polymers Student activity Play

Additional information contained in chemical equations Student activity Play

Aerobic respiration Student activity Play

Aerobic respiration Slideshow Play

Aerobic respiration in plants Student activity Play

Air Class activity Play

Air Whiteboard presentation Play

Air and a glass block Whiteboard exercise Play

Algebraic solution Animation Play

Algebraic solutions Whiteboard exercise Play

Algebraic solutions Student activity Play

Algorithm of the equation for hydrocarbon combustion Animation Play

Alkaline earth metals. Group 2 Class activity Play

Alkaline earth metals. Group 2 Whiteboard presentation Play

All salts are electrolytes Animation Play

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

Ammonia Student activity Play

Ammonia water Animation Play

Ammonia – a weak base Animation Play

Ammonium nitrate Animation Play