Curriki

http://www.curriki.org/

Curriki is an online, free, open education service. Curriki is structured as a nonprofit organization to provide open educational resources primarily in support of K-12 education. Curricula and instructional materials are available at the Curriki website to teachers, professional educators, students, lifelong learners, and parents. The majority of the resources on the Curriki site fall under a Creative Commons license. Educational materials are provided by the Curriki community and are peer-reviewed for quality and adherence to standards.