Creative Commons
I think that Creative Commons will transform the way that students use digital work. Although there are millions of licensed works, the typical Google search with and without creative commons brings up much different results. Take a look at the two screenshots below for an example.
Flickr
Have you used Flickr in your classroom? I'd love to hear any tips, tricks, or links to blog posts about using Flickr in the elementary classroom!
Richardson, W. (2010). Blogs, wikis, podcasts, and other powerful web tools for classrooms. (3rd ed.). Thousand Oak, California: Corwin.