Number Sense:
Our first unit of study in math is number sense. This topic includes place value, rounding numbers to a specified place, and comparing and ordering numbers. Here are some fun ways to practice:

In which place?
Comparing Numbers to millions

This website has links to lots of math (number sense & computation) games categorized by RIT score.

http://www.belleplaine.k12.mn.us/se3bin/clientgenie.cgi?schoolname=school357&statusFlag=goGenie&geniesite=133&myButton=g5plugin&db=g133_b545