NASA has developed a catalog of education resources as part of its CORE program (CORE stands for Central Operation of Resources for Educators).  On the CORE website, there is a catalog of products available.  The resources are not free, but seem to be reasonably priced.  They offer DVDs, ($15-20), activity kits ($6 and up), and other types of media for ages ranging from kindergarten to 12th grade.  Click on “CORE Main Page” to be directed to their site.

CORE Main Page