I use Google Docs all the time for collaboration for workshops and meetings, and for my own writing — I can move from one location to another without having to hang a flashdrive around my neck. In fact, yesterday, in class, as my students were doing some freewriting, I was writing a poem that I put on my Google Docs and then revised it back home.
Now, Google has added a presentation (powerpoint) format to its Google Docs platform and it seems to be pretty cool. A bunch of folks are already trying it out and seeing what is possible and what is not (you can upload PP shows but not Keynote, apparently), but the idea of collaborating on a presentation seems pretty nifty to me. Cool Cat Teacher created this slideshow collaboratively to show some of the ins and outs of the tool.
Meanwhile, I found this video from CommonCraft (those guys again!) on how to use Google Docs. It’s a bit old but still useful.
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Peace (in collaboration),