Acceleration and force Student activity Play

Action and reaction Student activity Play

Age-related changes in the human body Slideshow Play

Agglutinogens and agglutinins Simulation Play

AIDS – an example of a viral disease Class activity Play

AIDS – an example of a viral disease Whiteboard presentation Play

Alternation of generations in bryophytes Slideshow Play

An egg cell Whiteboard exercise Play

An electrically neutral body Animation Play

Anaerobic respiration Slideshow Play

Analysis of the propagation of seismic waves Slideshow Play

Angiosperms - ovule and pollen grain Whiteboard exercise Play

Angiosperms – seed plants with sporophyte and gametophyte generations Student activity Play

Animal cell structure Whiteboard exercise Play

Animal cells Student activity Play

Animal cells under a microscope Slideshow Play

Antigen-presenting cell Animation Play

Apical and lateral meristems Student activity Play

Apoptosis Animation Play

Application of electric motors Student activity Play

Application of radioactive isotopes Student activity Play

Applications of voltaic cells Whiteboard exercise Play

Archimedes' Principle for a body submerged in a liquid Animation Play

Arranging metals according to their increasing reducing power Simulation Play

Arranging metals according to their increasing reducing power Student activity Play