Schools have a lot of resources at their fingertips, if they know where to look.
It's not every math teacher who knows about the Cortona or Flux Player plug-ins, that'll bring virtual worlds to life -- I'm talking VRML and/or X3D here, great tools for studying geometry.
Then there's Peda's stuff, and ZomeTool.
VIP Koski likes vZome for the virtual versions. Build the 59 stellations of the icosahedron or whatever it is.
The Portland Knowledge Lab still has a StrangeAttractors kit in its collection, worth a fortune given its rarity.