Middle schoolers complete basic operations using percentages in a variety of real world situations. Discounts are computed and compared to a variety of prices listed in local newspaper advertisements.

Eighth graders investigate percents by comparing different discounts on the same sale item, practice graphing percents, and look at reasonable and unreasonable "percents off" a sale item.

Seventh graders investigate sales tax. Following a teacher demonstration, they find sales tax and the total cost of items. In groups, classmates choose items from a menu that they would like to purchase. Each student figures the sales...

Seventh graders solve real-life problems involving sales tax, discount, and simple interest. They find the amount of discount. In groups, 7th graders examine a sales advertisement. Given a budget, they choose purchases, and figure the...