Interactive tool for use alongside the mathematical investigation "hide the spies". Further resources can be found at:
[url]http://www.nuffieldfoundation.org/applying-mathematical-processes/hide-spies[/url]
Essentially the aim is to see how many ways spies can hide in a park using the green bushes. The resulting pattern should allow students to make a number of predictions for a 16 bush park by introducing the idea of factorials. The investigation can be extended to rectangular parks.
