“Imagine a totally unique program. A program that gives you the opportunity to play with physics – using your own hands. Apply a constructionists learning paradigm, learning by doing. Use simple drawing tools to design, construct and explore with. Sounds like an interesting idea? We believe Algodoo is that program.”
This software is paid for but does have a free demo that you can play with. More info on this blog post:
A website with a series of Flash based resources for the teaching of mathematics.
This software can be downloaded for free. Obviously, the free version is a little more locked down than the paid version but it’s well worth a look!
Sketchpad gives students a tangible, visual way to learn mathematics that increases their engagement, understanding, and achievement. And it’s not just for geometry. Use it for elementary and middle school math, algebra, precalculus, and calculus
This Java applet looks to be quite old but it still has value when teaching the early concepts of Ratio. Pupils are asked to place fish into ponds and discover that there is more than one way to show ratio.
This would even be a fabulous game to re-create in your IWB software! 
Rather than citing all 107 resources separately, I invite you to explore this very rich maths resource. With interactive activities that range from K -12 this is a really valuable place to stock up your collection.
I really like the Dynamic Paper creator as it helps with the gaps in some IWB software when it comes to creating precise graphing axis, grids etc. You can create your grid/ axis / shape etc and then save them as a jpg or PDF. This can then be imported into Activ Inspire, Notebook, Easiteach or any other IWB software and used effectively.
Other Fabulous resources include:
plus so many more!
