"SlideWiki aims to exploit the wisdom, creativity and productivity of the crowd for the creation of qualitative, rich, engaging educational content. With SlideWiki users can create and collaborate on slides, diagrams, assessments and arrange this content in richly-structured course presentations."
Tt seems interesting
An example
I'll try it on my next presentation. :)
Tom
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Everton Zanella Alvarenga (also Tom)
OKFN Brasil - Rede pelo Conhecimento Livre
http://br.okfn.org