GUI tookit for science and education

[phil]

> 
> Tkinter is the default GUI for Python, it runs on lots of platforms 
> and often comes already installed (on Linux or Unix distributions).
> 


I use Tkinter for a geometry course. I think it is fairly easy to
learn, much easier than say VB.  VERY portable and pretty well
documented and very well supported on this list.
It doesn't have much math built in.  For functions you have to
plot points.