Hey, Fellow Math Teachers!
No need to re-invent the wheel!
Here are links to other web sites with great teaching tools

Back to http://zendog.org/homework

Website
Description
http://www.timath.com/
Lessons and Activities using TI Calculators
http://learning.blogs.nytimes.com/category/mathematics/
The New York Times Learning Network for Mathematics [you need an account but it is FREE]
http://illuminations.nctm.org/
NCTM's fabulous "Resources for Teaching Math" [Yes, I am a member, but you don't need to be a member to use this great web site]
http://www.mathexpression.com/
Tons of videos, tips and practice
http://www.mathalicious.com/index.php
Lessons that emphasize "real-world" applications [from Middle School through Algebra II]
http://www.teachervision.fen.com/math/teacher-resources/8592.html
K-12 Math Printable Resources
http://www.mathworksheetsworld.com/
12000 printable K-12 math worksheets
[Note:  You may need to be a member]
http://www.wiu.edu/users/mfjro1/wiu/tea/game-files/gamesfront.htm
Games and PowerPoint Games for Math Practice
http://mathbits.com/
Lessons and Activities for High School Math
http://www.coolmath.com/
Described as "An amusement park of math and more"
http://www.onlinemathlearning.com/algebra-math-games.html
Algebra Math Games
http://www.xpmath.com/forums/arcade.php?do=play&gameid=59
An awesome graphing game that involves Homer Simpon and donuts! [Mmm, donuts!]
http://www.purplemath.com/
Algebra Lessons, Quizzes, and Worksheets
http://free.ed.gov/subjects.cfm?subject_id=186&toplvl=33&res_feature_request=1
Federal Resources for Educational Excellence
[Hey, they are free!]
http://www.mrbartonmaths.com/algebra.htm
Mr. Barton's "Maths" resources [sounds British]
http://www.ibmaths.com
A collection of IB stuff - some of it is free
http://www.algebrahelp.com/
A site for both teachers and students