A change in speed during the passage to a different medium Whiteboard exercise Play

A change in speed during the passage to a different medium Animation Play

A change in the medium of wave propagation Simulation Play

A change in the medium of wave propagation Whiteboard exercise Play

A change in the medium of wave propagation Student activity Play

A change of medium Simulation Play

A change of medium Student activity Play

A change of medium Whiteboard exercise Play

A change of medium Animation Play

A change of nutrient in the culture medium Animation Play

A laser Student activity Play

A plate Animation Play

A plate Simulation Play

A plate Whiteboard exercise Play

A plate Student activity Play

A spoon in a glass of water Animation Play

Absorption spectra Student activity Play

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

Addition of strong acid to an ammonium buffer Animation Play

Air drag Class activity Play

Alkaline earth metals Whiteboard exercise Play

Alkaline earth metals Student activity Play

Alkaline earth metals Slideshow Play

Alkaline earth metals Whiteboard exercise Play

Alkaline earth metals. Group 2 Class activity Play