Texas Instruments
Texas Instruments: Getting Started With the Ti Navigator: Discount Savings
This lesson is intended to help students develop an understanding of sale information to compute discounts, discount rates, original prices and sale prices.
PBS
Pbs: The Lowdown: Percents Combined: Proportional Relationships With Multistep Ratio and Percent Problems
Learn how to calculate sale price when combining two "percent-off" discounts in this video from KQED. In the accompanying classroom activity, students develop and share a variety of strategies, including modeling with a 10 x 10 grid to...