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

Adaptation of organisms to osmosis Slideshow Play

Adaptation of the root to absorbing water from the soil Slideshow Play

Adaptations of fish to life in water Student activity Play

Adaptations of fish to life in water Slideshow Play

Adaptations of mammals and fish to life in water Whiteboard exercise Play

Adaptations of mammals to life in water Slideshow Play

Adaptations of mammals to life in water Student activity Play

Adaptations of predators and prey Illustration Play

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

Addition of elements to alkenes Student activity Play

Addition of water to alkenes Student activity Play

Addition of water to alkenes Animation 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

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