The NASA-sponsored Central Operation of Resources for Educators (CORE) has closed. CORE was operated through a cooperative agreement with Lorain County Joint Vocational School in Oberlin, Ohio. The cooperative agreement, which provided funding for CORE, ended on June 30, 2013.
A wide variety of NASA educational materials, video clips, and links to other NASA educational websites can be found using the NASA education materials finder: http://www.nasa.gov/education/materials.
Educators can also contact the NASA Educator Resource Center that serves their state concerning the availability of educational materials: http://www.nasa.gov/offices/education/programs/national/ercn/home/index.html.