Learnist is very similar to JogTheWeb and just as easy to use. It is the Pinterest of learning and it free.  The interactive platform allows users collect teaching materials and educational content that are grouped into “boards”.  It also enables users to pick  images anywhere on the web and automatically shoots them to your Learnist board. Below is a video demonstration.

I would like to suggest that teachers may explore this to create their own Learnist and then give students the Learnist URL. I would not recommend students freely searching other Learnist pages some of the content is not appropriate. Here is a really quick one that I just put together:

You can even use Learnist on iPads.