What's inside

Teach a real-world Black Friday math lesson for free! This sampler includes the Discount Math Toolkit (six formulas with worked examples: percent off, sales tax, stacked discounts, percent change, working backward, and unit price) and the Doorbuster Decoder, where students compare three fictional ads for the same earbuds with tax and shipping and name each store's marketing tactic. Answer key included. Loved it? The full Is It Really a Deal? project adds a sale psychology article, a 12-problem d