What I enjoyed most (aside from getting to see former coworkers, students, and classmates from my grad program) was the last session I went to. It was called "Hacking GeoGebra Applets to Collect Student Work Using Google Forms" and it was a lesson on how to incorporate google forms into geogebra so that students can input answers to questions about a geogebra applet which will then feed into a google spreadsheet. Perfection.
The instructor's name was Dave Pugh, and he's a high school teacher at an alternative school in Minnesota. If you go to his website, click on the Geogebra link; his directions and examples can be found there. I wish I could say it was intuitive for me, but I don't have any programming or html experience and I've done a lot of trials to get this to work. I think. I thought it was pretty darn cool! (The spacing has been bothering me the most, but I can deal with it. Or just keep working on it!)
Geogebra and Google Forms
Created with GeoGebra