Science A-Z resources.
Anyone should have access to these links:
PBS Kids, Parents & Educators Lessons
NASA Mars Education Lessons
NASA eClips
National Geographic Education
6 Characteristics of a Great STEM Lesson: has links embedded in the article, too!
Discovery Education Science Projects
DiscoverE Engineering- lessons and projects
Breakout.edu- breakout activities, both printable and digital
BetterLesson- bank of math and science lessons, I've linked the science lessons, look at the Engineering, Technology and Application of Science strand
Heyworth LEAP Website
4 Elements of Great STEM Education article