What it is: Education Diigo offers k-12 and higher ed educators premium Diigo accounts! The premium accounts provide the ability to create student accounts for whole classes, students of the same class are automatically set up as a Diigo group so they can easily share bookmarks, annotations, and group forums, privacy settings so that only classmates and teachers can communicate with students, and any advertisments on Education Diigo are education related. If you aren’t familiar with Diigo, it is a social bookmarking website where students can collaborate on the web. Diigo works in to a project based learning environment nicely and allows for exploratory learning and collaboration.