| Approximation of Pi Applet | This applet helps us see Archimedes' method of approximating pi. |
| The Rolling Circle Worksheet | This worksheet guides learners to discover the formula for pi. |
| Rolling Circle Video | A youtube video illustrating the rolling circle method from the worksheet above. |
| A Million Pi...or Digits of Pi | The Pi Day webiste: this page shows a million digits of pi. |
| Wikipedia: Pi | More information about pi. This site may have information that is not 100% accurate. |
| Rhind Papyrus | Information about the famous Rhind Papyrus. |
| Burton, David A. The History of Mathematics: An Introduction (sixth edition). New York: McGraw Hill, 2007. Print. | A text book that covers from the earliest math to modern math. |
| Arndt, Jörg; Haenel, Christoph (2006). Pi Unleashed. Springer-Verlag. ISBN 978-3-540-66572-4. Retrieved 2013-06-05. | This book talked about the modern use of pi and computing with infinite series. |
| Schudel, Matt (25 March 2009). "John W. Wrench, Jr.: Mathematician Had a Taste for Pi". The Washington Post. p. B5. | This article talked about the obsession of computing more digits of pi. |