If you use NASA as a STEM resource like I do, then you can breathe a sign of relief that NASA has compiled all of their resources into one easy to use place- NASA Wavelength.
Designed specifically for teachers and students, this easy to use portal allows users to search by Audience or Topic. To further refine results, users can filter by unique categories such as Instructional Strategies, Learning Time, and Materials Cost (always important to classroom teachers!) among others.
In addition to these features, NASA has added a social media aspect and has provided the ability to share content with sites like Facebook, Pinterest, and LinkedIn (as well as good old fashioned email). This is a giant step to making these resources accessible to teachers and the K-12 audience.