While teaching MAT082 this semester, I found that the students enjoyed a simple real world/hands on activity we did. We were studying estimating by rounding as well as adding and subtracting decimals. I had each student go to walmart.com or target.com and "go shopping". Each student at the group was assigned a place value to round to. Then they estimated the total cost of their cart. They were required to shop for 7 items. They estimated the total then they subtracted their estimate from the actual cost (which the website calculated for them). As a class, we then analyzed the effect that rounding to different place values has on the accuracy of the total cost. It was a really fun class and a way to get students to practice several skills and analyze math while doing something they are familiar with in their own lives.