I commenced my teaching as a high school English and mathematics teacher, so I understand the differences in teaching in these two areas. As a result, I've often sympathized with mathematics teachers in terms of lack of ease in using computing in classrooms, due to the difficulty of communicating math symbols and computations.
However, I'm really pleased to see so many great online resources for math practice now. Grade 8 students at CIS 339 have been using mathscore.com all year, and they seem to really enjoy it. The math teachers have been incredible in their use of shared Google Docs, Google Groups, wikispaces, and SMART notebook files for collaboration on lesson plans, unit plans, and assessments.
Now the math classrooms can also utilize great sites such as:
Arithmetic Problems and Kids Math Practice Exercises
Online Basic Skill Games
thinkquest problems home page
Working on Algebra
Working on fractions
Multiple Choice questions – all strands of math
Decimals to Fractions
Percentage Word Problems
Online Basic Skills Games
Step-by-step word problems