Britannica School is an online encyclopedia resource for kids in grades K-12 with safe, fact-checked, age-appropriate content for homework help and learning .

A great google alternative for kids.

Kiddle is a visual search engine for kids, offering safe kids web, image, and video search. Safe, trusted sites that are not written specifically for kids, but have content written in a simple way, easy for kids to understand. The encyclopedia section is good as well as their search engine.

Results are vetted by editors. There are ads, but navigating them and understanding the difference between ads and content is also a lesson in itself for children online, and unlike a lot of websites they aren't invasive.

More about Kiddle.

Beautiful educational website for students to learn about animals, habitats, and other science and social studies topics.