Are you interested in learning about current news or historical events...participate in the Story Chasers blog/wiki. Students and teachers can research such items in their local communities and share them in a collabortive way via connections on this site.
"It's a drill-the-skills sort of site with a twist: students practice math and spelling skills by competing with other players that can be anywhere in the world. So, in essence, you also have the potential for some social studies." (Source: Laura Smith's Blog)