Have you seen the new Function Machines on Polypad? Try them for yourself at and learn more about them in this Polypad Pointer video:

Ooooh I love it!

So great! Sharing with my Numeracy Team in @ASD_West today so we can get teachers on board!

So nice! Thks for sharing. Maco, maco! @pbalaguer19 @raulf @smuria #matxat

This is great! I want to use it to illustrate the concept of composite function domains, but it wouldn't let me put negative values into the square root function (what I would love is some sort of animation/signal that it breaks the machine and then it spits the number back out).

Now this is awesome!!!