Herbivory: digestion of plant food Student activity Play

Heterotrophism in plants Student activity Play

High-voltage transmission lines Student activity Play

High-voltage transmission lines Illustration Play

High-voltage transmission lines Slideshow Play

Higher voltage but lower current Whiteboard exercise Play

Higher voltage but lower current Student activity Play

Higher voltage but lower current Illustration Play

Homeostatic regulation in plants Slideshow Play

Household electrical wiring Simulation Play

How do we divide powers of 10? Whiteboard exercise Play

How do we multiply powers of 10? Animation Play

How homeostatic mechanisms work – blood calcium levels Student activity Play

How many different divisors does a natural number have? A more difficult problem Student activity Play

How many divisors? Whiteboard exercise Play

How many divisors? Animation Play

How much can you save by using an energy-saving light bulb? Whiteboard exercise Play

How much can you save by using an energy-saving light bulb? Whiteboard exercise Play

How much can you save by using an energy-saving light bulb? Whiteboard exercise Play

How much can you save by using an energy-saving light bulb? Student activity Play

How much does it cost to watch television? Whiteboard exercise Play

How much does it cost to watch television? Student activity Play

How planets reflect light Student activity Play

How plants obtain the substances necessary for life Slideshow Play

How to calculate the power of an electric current Simulation Play