MacTutor Biography of Pythagoras

http://www.andrews.edu/~calkins/math/biograph/biopytha.htm

http://www.age-of-the-sage.org/greek/philosopher/pythagoras_biography.html

History of Pythagorean Society  http://history.hanover.edu/texts/presoc/pythagor.htm

Biography written for upper elementary included in AIMS preview of Historical Connections in Mathematics: http://wwws.aimsedu.org/previews/bkprev/HistConn1.html

Activities and problem solving from Historical Connections in Mathematics (click on the preview from AIMS site)

Pythagorean Theorum Proof  http://mathforum.org/isaac/problems/pythagthm.html

More Pythagorean proofs   http://www.cut-the-knot.org/pythagoras/index.shtml

Interactive Theorum Proof   This site has a very good step by step demonstration of a proof of the Pythagorean Theorem, a2 + b2 = c2

A Collection of Essays and Lessons for Jr /Sr High School  http://www.mathgym.com.au/history/pythagoras/pyth.htm

Pythagoras' Mystery Tablet  http://mathforum.org/escotpow/solutions/solution.ehtml?puzzle=46http://www.shodor.org/interactivate/activities/pyth2/index.html

Music in Space  http://www.aboutscotland.com/harmony/prop.html

The Magic of Pythagoras in an Unknown Rectangle  http://168.144.111.81/shape_space/magicofpythagoras.htm