This is a teacher-friendly alternative to YouTube. Go to the Channels tab to narrow your search. You will find videos on Reading and Writing as well as a whole host of YL material.
This site has an archive of user contributed clip art that can be freely used. All graphics submitted to the project should be used according to the statement by the Creative Commons licence.
Dorsley Kindersly is famous for the picture books it produces. The images on the site can be used in class projects as they are very clear and usually come with a white background.
This search tool accesses search engines (Google, Yahoo, Flickr, Blip.tv) that identify websites that either contain metadata of or a link back to a Creative Commons license.