Practice adding and subtracting integers. http://www.math.com/school/subject1/lessons/S1U1L11GL.html
Many helpful websites regarding middle school math curriculum/homework help. http://webspirations.dpsk12.org/Math
http://www.aplusmath.com/
http://www.algebra.com/
Practice Math Puzzles http://www.kaidy.com/SumPlus_mul.html
Math Games by Grade Level http://www.funbrain.com/cgi-bin/getskill_s.cgi?A1=selects&A2=math&A4=1&A7=0
Fact Monster http://www.factmonster.com/games.html
Arthimetic Speed Game http://www.coolmath-games.com/arithmattack/index.html
Add/Subtract/Mulitply/Divide http://www.coolmath-games.com/numbermonster/mult25.htm
puzzlejanuary.htm
CSAP Practice Tests http://www.brainchild.com/gen/usmap.asp
http://www.funbrain.com/index.html