This is a talk I gave at the Klein Workshop "Didactics of Mathematics as a Mathematical Discipline" in Funchal, Madeira, on Oct. 2, 2009.
The title might be a little bit misleading as I changed the content of the talk later.
My main messages:
- Computer software for doing mathematics must respect mathematics
- Wikis are important for the Klein Project, but need work
- We have to look at mathematical processes, in particular Change & Analyze, Create & Design and Decide & Compare
I also advocate that teachers should use programming (in a suitable language) for teaching mathematics.

More info at

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