Download
You can get a Java version of the calculator here that you can run on your Mac or PC (Windows or Linux).
For best results, you will need a SMART board (as shown below), a graphics tablet, or a Mimio.

Weapons of maths construction
You can get a Java version of the calculator here that you can run on your Mac or PC (Windows or Linux).
For best results, you will need a SMART board (as shown below), a graphics tablet, or a Mimio.