Geogebra is a free and open source geometry program, similar in function to Geometer's sketchpad. It also allows for exporting your work to a web friendly format.
This coming Wednesday March 25th, either between 7am to 10am or 1pm to 5pm I plan on running an online workshop on how to use Geogebra. This will have to be limited to the first 20 participants as I am using the free online and screen-sharing website,
http://dimdim.com (which has a limit of 20 people for free meetings).
Sign up here:
http://davidwees.com/content/online-geogebra-training
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