Dueling Discounts
by Dan Meyer
skips
questions
Act One
 Teacher noteMake sure students write down their ideas on their own, then share them with their classmates, and then share them out with the class. The worst case scenario is for one student to yell out, "It depends," at which point no one else thinks about the problem.
 Teacher noteAlso: take a vote. Tally their responses.
Act Two
 Teacher noteEither print out the following images for each student or put them at different stations. Students should calculate which coupon is the best deal for each.
 ImageDesk
 1.
Which coupon would be best to use for the desk?
 ImageAvenger's Playset
 2.
Which coupon would be best to use for the Avenger's Playset?
 ImageBatmobile
 3.
Which coupon would be best to use for the Batmobile?
 ImageCD player
 4.
Which coupon would be best to use for the CD Player?
 ImageChair
 5.
Which coupon would be best to use for the chair?
 ImageConverse shoes
 6.
Which coupon would be best to use for the Converse shoes?
 ImageNightstand
 7.
Which coupon would be best to use for the nightstand?
 ImageCoffee percolator
 8.
Which coupon would be best to use for the coffee percolator?
 ImageWidescreen TV
 9.
Which coupon would be best to use for the widescreen TV?
 10.
This is exhausting. Can you come up with a rule that would help us decide under what circumstances we should use one coupon or the other?
 Teacher noteReally play up how exhausting it is to run the same calculation every time. Mathematicians like think smarter, not harder.
Sequel
 11.
What if you were holding two coupons, one that said, "$x off" and the other said, "x%" off. Which do you use and when?
show 66 more questions




















How much money would an item originally cost(to nearest $1) where the cost of the item with $20 off saves you less money than the 20% off?









Can I print out as many copies of each coupon as I want? If so, what is the best combination?















Which discount will save you more money? What information do you need to know to make this determination?



diskon manakah yang lebih menarik dan yang lebih menguntungkan perusahaan?



















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