Website
Wolfram Research

Wolfram Math World: World's Most Extensive Mathematics Resource

For Students 9th - 10th Standards
MathWorld provides a huge mathematics encyclopedia detailing the concepts of geometry, algebra, calculus, discrete math, number theory, and other math topics--complete with formulas, diagrams, examples, and references for thorough...
Handout
Trinity College Dublin

History of Mathematics: Bonaventura Cavalieri (1598 1647)

For Students 9th - 10th
A biography of Cavalieri that includes information on his principle or "indivisibles." From a 1904 text by W. W. Rouse Ball.
Website
Other

Academic Info: Mathematics Gateway

For Students 9th - 10th
This site provides a comprehensive index and general directory to math sites that will help students in the study of circles.
Handout
Other

Seton Hall University: Johann Bernoulli (1667 1748)

For Students 9th - 10th
A great biography of Johann Bernoulli is provided at this site. An audio clip is provided, as well as a good list of primary sources.