I have recently discovered a similar tool, Scoop.it, that is formatted similarly to Pinterest, but it shares information, articles and sources instead of craft ideas or recipes. The posts are then organized into "magazines" instead of pinboards and the site even suggests similar sources of interest. While there is a paid subscription service available on Scoop.it, the free edition allows users to store up to five topic magazines.
You can train your students to use Scoop.it to do research and set up accounts for each student, or you can use it as a way to share your own magazines with students. Just like Twitter, Pinterest and other familiar social sharing sites, users can "follow" other users and get updates about their posts and topics. Your students can follow you and you may just find some other educators out there with similar interests to follow yourself!
Your magazines are user-friendly snippets with images instead of just lists of links. They function similar to Pinterest pinboards so some students may need less instruction on how to use them.
Image is from Seth Dixon's board entitled "History and Social Studies Education" for the Rhode Island College.