Connexions
According to their website,
Connexions is "an environment for collaboratively developing, freely sharing, and rapidly publishing scholarly content on the Web. Our Content Commons contains educational materials for everyone — from children to college students to professionals — organized in small modules that are easily connected into larger collections or courses. All content is free to use and reuse under the
Creative Commons "attribution" license."
Basically, free content for you to use on the web!
Click here to visit the site.
