This activity helps students grasp how energy flows. Scroll down to materials and click on Energy Pyramid Activity-Teacher Version for the lesson plan.
I think a key element to the credibility of this set of resources is that they were curated/produced by the Science Education Resource Center (SERC) at Carleton College and its partners with funding from the National Science Foundation.
Geology Lab Videos by Tom Braziunas at North Seattle Community College - students can view short video demonstrations of some of the physical geology lab activities
This is an activity I use as a visual for the students to see the different types of pollution that affect rivers. I modify it by talking about the MO river.
Animated video that explains the importance of coral reefs in the food web. Narrated by Celine Cousteau, the video is ideal for school kids and an great tool for teachers to introduce them to ocean biology, environmental issues and social activism.4.1.B.a; 4.1.B.c; 4.1.D.a; 4.2.A.a