Continuing with the lifeskills for special education theme, this math-based life skills website called Consumer Math is a great place to start. There are different levels of skill with their worksheets and it is extremely user friendly and helpful for all children. I think it's so important to teach children that if they can't afford something, they just can't buy it. they have to learn to put it back or pick something that they can afford. Also, learning to make change or realize what change they have "owed" to them from the cashier is a vital lifeskill that should be practiced.