Here are some Open Education Resources that you are could refer to.
Open Educational Resources
Project Gutenberg: Free e-books by Project Gutenberg http://www.gutenberg.org/wiki/Main_Page
ERIC- Education Resources Information Center- an internet-based digital library of education research and information sponsored by the Institute of Education Sciences of the U.S. Department of Education- World’s largest digital library of education literature http://www.eric.ed.gov/
Open Access Journals- the directory of open access journals-public library of sciences http://www.doaj.org/
Moodle: Open source e-learning platform software package designed to help educators easily create quality online courses http://moodle.org/
Eduforge: an open access environment designed for the sharing of ideas, research outcomes, open content and open source software for education http://www.eduforge.org/
Dspace: Dspace digital repository system http://www.dspace.org/
Sakai: a community of educators collaborating to create open software that advances teaching, learning and research http://sakaiproject.org/
MIT OCW: open sharing of the MIT’s faculty’s teaching materials with educators, enrolled students, and self-learners around the world http://ocw.mit.edu/index.htm
OpenCourseWare Consortium: a collaboration of more than 100 higher education institutions http://www.ocwconsortium.org/
Connexions: Open educational resource platform at the Rice University http://cnx.org/
Connexions is not limited to the content produced within its host institution- any one can submit contributions and has peer-reviewed after publication
Common Wealth of Learning- Learning for Development : The Commonwealth is a voluntary association of more than 50 independent sovereign states, which provide support to each other, and work together toward international goals. The Commonwealth is described as a "family" of nations, originally linked together in the British Empire, and now building on their common heritage in language, culture and education, which enables them to work together in an atmosphere of greater trust and understanding than generally prevails among nations.
UNESCO Virtual University: http://www.unesco.org/iiep/virtualuniversity/forumsfiche.php?queryforumspages_id=13
Talking books for the Blind Foundation http://www.sachnoionline.com/
THE VIETNAM FOUNDATION
"Improving the Lives of the Vietnamese People through Education"
Vietnam: The 8th floor, Newtatco Bld., 21 Lang Ha, Ba Dinh Dist., Hanoi. Phone: (84) 4-6278-2788 | Fax (84) 4-6278-2785. Email: email@example.com
USA: National Academies Building 500 Fifth Street NW, Room 570 Washington D.C. 20001. Phone: 202-334-2787