Activity 1 — 1 Wild about Harry

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Activity 1 - 1 Wild about Harry

Objectives • Practice communication skills • Organize information • Write a solution in sentences • Develop problem-solving skills

Vocabulary • None new

Description The last Harry Potter novel has just arrived and by 11 am a line has formed outside the crowded bookstore. Knowing you have class at noon, you ask the guard at the door how long you can expect to wait. She tells you that she is permitted to let 6 people into the store only after 6 people have left; customers are leaving at the rate of 2 customers per minute; and she has just let 6 new customers in. Also each customer spends an average of 15 minutes browsing at books and 10 minutes waiting in line to check out. Currently there are 38 people in line ahead of you. You know it is a 10 minute walk to your noon class. Can you buy your book and still get to class on time?

Steps in Problem Solving 1. Sort out the relevant information and organize it -- What facts help understand or solve the problem? -- What is the “time-line” involved? 2. Discuss the problem with others to increase your understanding of the problem 3. Write your solution in complete sentences to review your steps and check your answer

Relevant Description The last Harry Potter novel has just arrived and by 11 am a line has formed outside the crowded bookstore. Knowing you have class at noon, you ask the guard at the door how long you can expect to wait. She tells you that she is permitted to let 6 people into the store only after 6 people have left; customers are leaving at the rate of 2 customers per minute; and she has just left 6 new customers in. Also each customer spends an average of 15 minutes browsing at books and 10 minutes waiting in line to check out. Currently there are 38 people in line ahead of you. You know it is a 10 minute walk to your noon class. Can you buy your book and still get to class on time?

Drawing a Picture (modeling) Class 21 minutes to get into store 15 minutes browsing 10 minutes in line at registers 10 walk to class 56 minutes 10 min walk Registers Book Store 10 min wait 15 minutes browsing Line to get in 39 th in line means you are in the 7 th group of 6 2 people / minute 6 people / 3 minutes

Summary and Homework • Summary – Sort out the relevant information and organize it. – Use a graph (model) – Discuss the problem with others to increase your understanding of the problem. – Write your solution in complete sentences to review your steps and check your answer. • Homework – none

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