MentorMob: The Magic of the Learning Playlist
A "learning playlist" is a collection of sites organized by a user (teacher) to teach others any given: subject, topic, unit, etc. Best of all these playlists are very easy to create, can be embedded into a site, and be shared w/ others. Also, these playlists can be collaborated on by others to help stimulate and facilitate learning (if allowed by the creator). Plus, MM houses lots of playlists to choose from especially for education.

Via Ken Morrison, michel verstrepen, JoelleYalin