1. Desert Crossing Lesson Study March 13, 2012

2. Objective I will solve a problem using mathematical reasoning, and explain my reasoning through discourse. MR 2.5 Support solutions with evidence in both verbal and symbolic work.

3. This year you grew 45 watermelons that you need to get to the market 15 miles away. You can carry a maximum of 15 watermelons in your backpack at one time. So you don’t die of thirst or starvation, you have to eat one watermelon for each mile you walk (in either direction). Your challenge is to find a way to get as many watermelons as possible to market. Desert Crossing

4. This year you grew 45 watermelons that you need to get to the market 15 miles away. You can carry a maximum of 15 watermelons in your backpack at one time. So you don’t die of thirst or starvation, you have to eat one watermelon for each mile you walk (in either direction). Your challenge is to find a way to get as many watermelons as possible to market. Start when you are ready!

5. Test someone else’s solution! I chose to test _______ watermelons because______________________. I found that number of watermelons to be (reasonable or unreasonable) because _____________.

6. Final Solution The most watermelons you could get to the market is… 8

7. This year you grew 45 watermelons that you need to get to the market 15 miles away. You can carry a maximum of 15 watermelons in your backpack at one time. So you don’t die of thirst or starvation, you have to eat one watermelon for each mile you walk (in either direction).

8. Your challenge is to find a way to get as many watermelons as possible to market.