History and Culture of Math

Math in the Movies
http://world.std.com/~reinhold/mathmovies.html
MacTutor History of Mathematics
http://www-groups.dcs.st-and.ac.uk/~history/index.html
Math Forum: Past Math Awareness Weeks
http://mathforum.org/mam/past.html
Mathematical Moments
http://www.ams.org/ams/mathmoments.html
The Erdos Number Project
http://www.oakland.edu/~grossman/erdoshp.html
The Mathematics Genealogy Project
http://www.genealogy.math.ndsu.nodak.edu/
IMO—International Mathematical Olympiad
http://www.unl.edu/amc/e-exams/e9-imo/imo.html
Millennium Million Dollar Prize Problems
http://www.claymath.org/prizeproblems/index.htm
Recreational Mathematics (David Eppstein)
http://www.ics.uci.edu/~eppstein/recmath.html
Biography of Leonardo Fibonacci
http://www.lib.virginia.edu/science/parshall/fibonacc.html
Invalid proof techniques: by intimidation, by example, by vigorous hand waving....
http://www.maths.uwa.edu.au/~berwin/teach/M101/invalid.proofs.html
John Baez’ Crackpot Index
http://math.ucr.edu/home/baez/crackpot.html