Shawn Broderick

Some links I like.

NCTM

The Program of Mathematics Education

bttf.com

nasa.gov

usmint.gov

Assignment 1: Graphical Implications of Operating on Functions	Assignment 2: Graphical Implications of Varying the Coefficients of a Quadratic	Assignment 3: Locus of ax² + bx + c = 0
Assignment 4: Relationships Among Centers of Triangles	Assignment 5: Geometer's Sketchpad Script Tools	Assignment 6: Locus of Points Equidistant From Point and Circle
Assignment 7: Circle Tangent to Two Circles	Assignment 8: Circumcircle and Sums of Ratios of Altitudes	Assignment 9: Pedal Triangle and Triangle Centers
Assignment 10: Investigations of Parametric Equations	Assignment 11: Polar Equations	Assignment 12: Exploring Mathematics in Spreadsheets