Pinterest, accounts for which are still only available via invitation. It's basically a visual curation site to gather and share content around the web on any topic you choose. Fortunately, you do not need an account to see what pin-boards others have created and here's a very useful one from David Kapuler sharing a variety of free clipart sites for use in education.
- Pinterest is a great go-to site if you are looking for particular teaching resources that others recommend; here's another board for The Hunger Games but you can find boards for a huge variety of topics
- Learners could use Pinterest to find curated content on research topics; my learners are currently using it for the My Hero project and have managed to find some great links
- If learners request an account and are successful they could work together to create their own boards related to specific topics