A set of online learning centers including practice for the ACT/SAT, GRE, LSAT, CDL, NCLEX, ASVAB, US Citizenship, and a wide variety of other career and academic tests and courses.
ScienceFlix offers a wide range of science topics full of articles, videos, experiments, and interactive slideshows and timelines to help with your child's next science project. Designed for students in grades 4-9.
World Fact Book
The World Factbook, a website from the CIA, provides information on the history, people, government, economy, geography, communications, transportation, military, and physical and political maps for 267 world entities.