Do you use Symbaloo on your classroom computers? I was looking for the perfect site for our younger students. They were spelling the web address incorrectly and taking forever to get to their actual assignments. Once I heard about Symbaloo I spread the idea to my school because it is useful for all grades, not just the lower elementary.
There are several collections within this symbaloo page. I encourage students to bookmark the site at home so that they can have options when they are ready for an assignment. The teachers have them on their classroom computers to give options for classroom projects.
This webmix was designed for K-5 but our middle and high school students use them as well.