Waldomaths by Ron Barrow has extensive resources for students to explore. These work well on the interactive whiteboard.
There are numerous applets for ages 11-16, also for ages 16-19.
I like using these in class as students can then experiment themselves at home.
A recent addition is this applet on fractions which allows students to study examples and see how to handle fractions.
The fractions A and B can be changed and students can see how to add, subtract, multiply or divide the two fractions.
I have used and like many of these applets - Circle Theorems for GCSE for example or the Normal Distribution in KS5 to show how the probability changes for different areas under the curve. (I have used this together with a Normal Distribution calculator – see link on this page).
I really like Ron Barrow’s Waldomaths and use it a lot. I assume you have seen Spencer Riley’s excellent Teacher Led site which has many whiteboard resources.
Nrich have many interactives which work well on an IWB.
See IWB list on links page: http://colleenyoung.wordpress.com/latest-links/
Thanks Colleen, these are good resources. I wish there were more teaching resource sites focused on whiteboard activities.
John