CommonLit is a free collection of fiction and nonfiction for 3rd-12th grade classrooms.
Classroom
TED Talks for Kids
Discovery Education
Smithsonian Learning Lab
On the Smithsonian’s Learning Lab, teachers have access to digital resources from across the Smithsonian’s museums, research centers, libraries, archives, and more. The collections contain lessons, activities, and recommended resources made by Smithsonian museum educators and classroom teachers. The downloadable guide provides teachers with information on getting started in the Smithsonian Learning Lab.