Several of my colleagues used to teach math in their former lives, and have created some sample lessons covering a variety of math topics. Each includes the NCTM standard which each lesson fulfills.
If you're relatively new to Mathematica, these ready-made example lessons can give you a jumping-off point for using Mathematica in your classes...and give you a sneak peak at what's possible with Mathematica.
More are forthcoming, so stay tuned!
-Kathy
Binomial Expansion: Introduction to the FOIL Method
http://library.wolfram.com/infocenter/Courseware/7424/
Introduction to Slope: Calculating the slope of a line
http://library.wolfram.com/infocenter/Courseware/7426/
Pythagorean Theorem: Finding Distances in Right Triangles
http://library.wolfram.com/infocenter/Courseware/7425/
Advanced Absolute Value Graphs
http://library.wolfram.com/infocenter/Courseware/7417/
Advanced Transformations of Graphs: Stretching and Inverting Graphs
http://library.wolfram.com/infocenter/Courseware/7422/
Functions: Combination and Composition
http://library.wolfram.com/infocenter/Courseware/7418/
Logarithmic Graphs: Understanding the Characteristics and Behavior of Logarithmic Graphs
http://library.wolfram.com/infocenter/Courseware/7419/
Rational Functions: Vertical and Horizontal Asymptotes
http://library.wolfram.com/infocenter/Courseware/7420/
Transcendental Functions: Working with Exponential and Logarithmic Models
http://library.wolfram.com/infocenter/Courseware/7416/
Transformations of Graphs: Reflecting and Stretching Graphs
http://library.wolfram.com/infocenter/Courseware/7421/
Translations of Graphs
http://library.wolfram.com/infocenter/Courseware/7423/

