Over 8,000 websites created by students around the world who have participated in a ThinkQuest Competition.
Compete | FAQ | Contact Us
The Incredible Abacus
This site gives basic information on the age old calculator known as the abacus. Topics include the the history of the abacus, why it is used, how it is used, and who uses the abacus
19 & under
Math > Arithmetic
Science & Technology > Technology > Inventions