Kide Science

Storytelling plus creative lesson plans make STEAM concepts come alive
Bottom Line: This wonderful collection offers lots of neat offline activities that'll delight students and shape their thinking skills.
National Geographic Kids

Kid-friendly science and social studies info via videos, games, and more
Bottom Line: Large collection of approachable, fun multimedia resources about animals, habitats, countries, and cultures.
Lawrence Hall of Science: 24/7 Science

Outdated site still useful for science games and investigations
Bottom Line: Many of these interesting and highly educational activities, though a bit disorganized, still challenge and engage kids in important ways.
Mystery Science

Big questions, kids' curiosity drive impressive science curriculum
Bottom Line: Powerful, quirky science units encourage inquiry and experimentation, inspiring students to ask and answer big questions.
Makers Empire

Stellar 3D design hub promotes innovation, collaboration, and creation
Bottom Line: This is a great design and creation tool that teachers and students can use to be innovative and share ideas with a vibrant community of makers.
Tinybop Schools

Collection of STEM simulations that students will love to explore
Bottom Line: Tinybop Schools offers meaningful scientific exploration to students, particularly when partnered with good teaching and discussion.
Gizmos & Gadgets

Top-notch tool empowers kids to invent, build, and control wirelessly
Bottom Line: Easy-to-use, versatile electronic invention set that works wirelessly with your hand-held device.
Climate Kids

Kid-friendly, expert site explores key climate issues
Bottom Line: A great launching point for engaging in accurate and timely climate change information.
Mosa Mack Science

Engaging design challenges turn kids into actual science detectives
Bottom Line: A thorough, engaging way to weave some engineering into your middle school science lessons.
NOVA

Compelling science videos have high-quality classroom applications
Bottom Line: Unparalleled science documentaries offer a window into real-world scientific topics in a high-interest way.