www.khanacademy.org
Subtraction practice
Subtracting on a number line interactivewww.topmarks.co.uk/Flash.aspx?f=Subtractdifference
Fruit Splat Number Line subtractionwww.sheppardsoftware.com/mathgames/earlymath/FS_NumberLine_minus.htm
Pearl Diver Number line game (includes negative numbers)www.brainpop.com/games/pearldiver/pearldiver.swf
Gate Integers game mathsnacks.com/gate.html
Monster School Bus (Numbers and Operations)mathsnacks.com/monster-school-bus.html