Fact Monster is an ideal and trustworthy reference site for students aged 8+ that provides entertainment and educational resources. It is a reference site with facts on thousands of subjects, including sports, entertainment, geography, history, biography, education, and health. 

KidzSearch is a safe, moderated search engine for kids. This site uses Google technology to provide search results; however, their algorithm pushes educationally suited websites further up on the results. It provides quality academic content and safe search results for student research. 

Kidtopia is a Google custom student safe search engine for preschool and elementary students, indexing only educator approved web sites. It is easy to use and it provides links to safe websites. It is fun, colorful and easy for kids to use in Grades K-8.

Safe Search for Kids is a friendly Search Engine for Kids powered by Google providing kid safe internet filtering.  The platform is well organized, has a fun feel, and offers a dedicated search option for content, images, video, and wiki.  The search engine offers content regarding online safety, social media use, etc. that makes it easy for kids to reference at any point

Kiddle is a visual search engine for kids, offering safe kids web, image, and video search for students aged 8+. Results are vetted by editors. It lists over 700,000 articles, and is "based on selected content and facts from Wikipedia, rewritten for children."