I've only recently heard about Wikiversity and took a look at it.
It seems like a good resource for both teachers and students.
http://en.wikiversity.org/wiki/Wikiversity...ersity_teachers
http://en.wikiversity.org/wiki/Portal:Learning_Materials
http://en.wikiversity.org/wiki/Portal:Education
http://en.wikiversity.org/wiki/Learning_project
http://en.wikiversity.org/wiki/Wikiversity...munity_projects
http://en.wikiversity.org/wiki/Portal:Pre-school_Education
http://en.wikiversity.org/wiki/Portal:Primary_Education
http://en.wikiversity.org/wiki/Portal:Secondary_Education
http://en.wikiversity.org/wiki/Portal:Tertiary_Education
http://en.wikiversity.org/wiki/Category:School_subjects
http://en.wikiversity.org/wiki/Portal:History