Back to School templates for free (downloads)

http://office.microsoft.com/en-us/templates/CT011439441033.aspx

 

Math Tools for Teachers

http://www.mathtools.net/Excel/Mathematics/index.html

 

Prentice Hall Books and Resources for Computing

http://vig.prenhall.com/catalog/academic/course/0,1143,104,00.html

 

Middle School Math Lessons

http://www.educationworld.com/a_tech/tech/tech079.shtml

(some links do not work but worthwhile)