Open Resources

These Open Educational Resources (OERs) are lesson plans and other instructional resources which have been shared under a license that allows free use and modification.    Anything can be used for non-commercial purposes as long as attribution is provided. 

CK-12

Provides fre textbooks in a variety of subjects.  These digital works are collaboratively written and edited by international experts and offer additional materials, inclu

Curriki

Clearinghouse site for K-12 OER.