Science & Technology
This site contains a vast collection of simulations (best for elementary and middle schools). A free teacher account gives you 60 days to try any science or math simulation as well as the right to download curated activities and worksheets that complement the simulations.
Learn about a variety of basic science concepts with these engaging science cartoon videos (Best for elementary school). Free during the school closures.
Free for this school year, find “open-and-go" lessons that will inspire and engage students to explore important elementary science concepts.
This site contains a vast collection of physics, chemistry, biology and math simulations (best for middle school and high school). A free teacher account also gives you the right to download curated activities and worksheets that complement the simulations.
YouTube is a great place to find educational videos of all kinds. Above are a few of the channels I like that have entertaining and engaging science content. Find more here.
Find video lessons and assessments on this site for free. This is like having a free online tutor for almost any core subject in any grade level.