visualizing vector calculus and analytic geometry



josh wrote:

> Hi,
> 
> I'm a public schools math teacher (in Germany) and I'll be teaching a
> unit on analytical geometry in my 12 grade math course.
> 
> What I like to be able to do is to simply and quickly manipulate and
> visualize vectors ...

http://www.telefonica.net/web2/biomates/maxima/gpdraw/vectors/index.html

-- 
Michel Talon