Check out STEM Central
STEM Central is a recently-launched website whose goal is to provide resources and materials on STEM-related topics to students and teachers. At STEM Central, which is part of the Sally Ride Science project, one can find links to videos, articles, apps, and many other resources on a variety of subjects related to Science, Technology, Engineering, and Math.
Items can be selected by category, topic, grade level, media type, tags, and ratings.
Resources listed on the site were vetted for quality then cataloged and rated by a specially-selected team of teachers, researchers, and STEM professionals. However, beginning in November, the portal will be opened for all teachers to contribute to the collection by submitting and reviewing links and resources on STEM topics and careers as well as to share classroom-tested tips and tricks on using those resources. Be sure to check out STEM resources for your school and classroom at stemcentral.sallyridescience.com