A new bookmarking service that takes everything I liked about Pinterest to a whole new level. There is huge potential for this to become a great collaboration tool for education. You could use this for your Flipped Classroom assignments and the feature set lends itself to Project Based Learning as well. They have two killer features in my opinion, and many others you will love. Syncboard, allow you to share clipboards with your students and colleagues (requires a Clipix account, but you can invite them by e-mail); Multiboard which lets you create clipboard collections by just dragging them to the clipboard of your choice. The drag and drop functionality makes it easy for you to rearrange stuff and that is a winner as well. Follow this link to sign up for Clipix