Here is quatation from the web site
Connexions is an environment for collaboratively developing, freely sharing, and rapidly publishing scholarly content on the Web. It contains educational materials for everyone — from children to college students to professionals — organized in small modules that are easily connected into larger courses. All content is free to use and reuse under the Creative Commons "attribution" license .
And here is another resource:
This web site serves as a community site and resource of information for practitioners (teachers), researchers and school administrators in Computer Supported Collaborative Learning (CSCL) field. Here you can find news and best practices from CSCL community, links to CSCL research, information about CSCL software tools and have discussions with other members of the community.