Math ABC

http://www.mathabc.com/

Interactive math website for kids in 1st to 6th grade.

AAA Math

http://www.aaamath.com/B/index.htm

Study site for K-8th grade with a Spanish version.

Subjects Covered:
K-8th grade math topics up to geometry and algebra
Spelling
Vocabulary
States of the USA
World Nations

Features:
Interactive practice with games and pictures
Customizable spelling and vocabulary lists (1st-8th grade)
Math articles
Flags, capitals, states, and nations worksheets and exercises

Hyper History Timeline

http://www.hyperhistory.com/online_n2/History_n2/a.html

Interactive timeline of history: "Over 2000 files covering 3000 years of history"

Features: Maps, biographies, catagorization of events by science, politics, religion, war, culture, and time periods, free online textbook and other resources.

F Smitha Timeline of History

http://www.fsmitha.com/

A really cool condensed version of world history.

Features:
- Articles on sperate events
- Biographies
- Timeline - Can view by period, 100 year span, or even modern, up to date, day by day events.
- Commentaries
- Book and movie summeries
- Maps