• — note especially 3D, Cooper-Hewitt Design Museum, Lemelson Center; different from Smithsonian Education — which has a search function for resources by subject, grade level, etc.
• NASA has a wealth of resources. Dive in at the NASA educator portal.  OSU is a Space Grant University and has their own set of resources posted here.  
• The National Science Digital Library has myriad resources for K-12 STEM teachers.
• The National Renewable Energy Lab resources are here.
• All sorts of resources from federal agencies, laid out in an alphabetical list of resources — bring your keen eye and good search skills:  I saw webcasts, reading lists, websites, …
• The Library of Congress’s “materials and professional development to help teachers effectively use primary sources from the Library’s vast digital collections in their teaching.” are here.

Not an exhaustive list, but enough to make life (and school!) interesting.

Respectfully submitted,
Jo Oshiro
jo@oregoncsta.org

Update: featured image