Space Coupe to the rescue! (Integers)

http://pbskids.org/cyberchase/math-games/space-coupe-rescue/

Integer football game!

http://www.mathgoodies.com/games/integer_game/football.html

Subtraction of Integers

http://nlvm.usu.edu/en/nav/frames_asid_162_g_2_t_1.html?from=grade_g_2.html

Click on Computer to practice subtraction problems. Click on user to enter the problems yourself and solve.

Integer websites

http://www.ixl.com/math/grade-7 scroll down to Operations with integers and attempt word problems and subtraction.

http://my.hrw.com/math06_07/nsmedia/tools/Integer_Chips/Integer_Chips.html

use these if you have no counters to solve problems

http://www.bbc.co.uk/bitesize/ks2/maths/number/negative_numbers/play/

http://nlvm.usu.edu/en/nav/grade_g_3.html