Common Errors in College Mathematics
WomenTech e-Mail Discussion Group
Completing the square, a geometric perspective
Completing the Square: Solving Quadratic Equations
Understanding Algebraic FactoringConic sections - the ellipse, parabola, and hyperbola
Planarity, a game
The Free Rice vocabulary quiz
At Jim Loy's Mathematics Page, you can vote for your favorite rectangle, or see why there are no uninteresting numbers.
If the IRS had discovered the quadratic formula (in pdf format).
Foolproof:A Sampling of Mathematical Folk Humor(pdf format)
