My 10th grade geometry students now have a web log that they may use as a forum for communication and written assignments. they have been summarizing lessons as a comment post which I believe is of benefit in two ways. First, they get the opportunity to process a lesson or section and describe succinctly what they remember. Thirdly, they get to see exactly what their peers remembered through their processing, which may trigger a forgotten definition or property. This is good. I like it.
A complaint (adolescents complain?!?) is a percieved lack of time/resources to engage in this type of activity. I observe no lack of time for Free Rider (http://www.kongregate.com/games/onemorelevel/free-rider-2) so I'm not buyin it.