I've been searching around for STEM-related resources and I found this interesting site by PBS. It is the STEM Education Resource Center. It offers many links to quality websites and videos that relate to the STEM model. It has them categorized K-5 and 6-12th. There's a lot of information, lesson plans, and videos.
This blog was updated by former Irvin Librarian, Mr. Jaquez, from September 2011-March 2015.