Reference & fact sources
User-maintained encyclopedia using Basic English vocabulary and shorter sentences, easier to understand normally complex terms or phrases.
Video encyclopedia in 1, 2 and 3 minutes. Curated, filtered environment; constructed specifically for education and curated by professional experts in different fields
Reference site for students, teachers, and parents.
Facts, biographies, etc.
Free learning resources
Continents, countries, feature articles...
Facts on every country
The Encyclopedia of Life is a giant work in progress: the idea is to generate a page on every species known to science.
100 resources including encyclopedias, dictionaries, thesauruses…
High quality stuff on subjects as diverse as aeronautics and zoology.
Explains thousands of topics
The Smithsonian asks and answers questions every day about science, art, history and culture.
Librarian curated directory (closed). See pathfinders.
Curated reference sites run by volunteer library and information science professionals.
Association for Library Service to Children.
K-12 homework-related sites together with engaging editorial in one high-utility, educational spot.
Reviews for the best sites for kids on the Internet together in one convenient location.
Extensive guide to online reference works.
Websites and interactive content by subject/book.
The WDL makes available on the Internet, free of charge and in multilingual format, significant primary materials from all countries and cultures.