Other
Academic Info: Mathematics Gateway
This site provides a comprehensive index and general directory to math sites that will help students in the study of circles.
Other
Science Gems: Mathematics
This site has many links to math topics including pre calculus and calculus
University of Toronto (Canada)
University of Toronto Mathematics: Is There Really Such a Thing as "Infinity"?
See how the existence of infinity depends on the context in which it is used. Offers a look at the concept of infinity from different view points.
University of St. Andrews (UK)
University of St. Andrews: Waclaw Sierpinski
This site, which is provided for by the University of St. Andrews, gives information on the life and accomplishments of mathematician Sierpinski.