Wow! What a cool site for teachers! (and students and everyone, for that matter!)
The Lemelson Center for the Study of Invention and Innovation located at the Smithsonian Institution's National Museum of American History has a ton of great resources on their website.
Here's a list of some of the items they have:
*Stories of Inventions & Innovations in our society
*Videos & Podcasts
*Virtual Exhibits & Explorations
You won't believe all the cool things you can learn and read about.
There are a ton of categories & an endless supply of resources.
Check it out! You'll love it!