The Social Media Classroom is a new project started by Howard Rheingold which offers an open-source Drupal-based web service to teachers and students for the purpose of introducing social media into the classroom. The service includes tools like forums, blogs, wikis, chat, social bookmarking, RSS, microblogging, widgets, video conferencing, and more.
Rememberize uses flashcards with a Leitner-style learning schedule to help you remember all the things that you wished you could - dates, places, events, they're all no problem. Ace your exams with intricate knowledge of chemistr