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## Chapter 1

### Part 1: For activity in Teacher's Edition, page 2

Students can practice their research skills by trying to find the number of people in each age group in your town. Or you can provide them with the data sheet with information about the Number of People in Different Age Groups in Four States found on the Activity page (PDF file).

If you use the data that we have provided, ask the students to choose one of the four states and predict which age group will have the greatest number of people in that state. Then have them look at the Data Sheet to see if their prediction was correct.

If students are going to try to do this activity with data about their town, ask them to predict which age group they think will have the greatest number of people in it. Then have them do research to find the number of people in each age group in their town. Finally, ask them to compare their prediction to what they found.

### Part 2: Be an Investigator

A good time to do this investigation is after Lesson 4 on comparing, ordering, and rounding whole numbers.

#### Introducing the Investigation

Introduce the investigation by reading aloud the assignment at the top of the first page of the Description of Investigation and Student Report (PDF file), by having one of your students read aloud the assignment, or by having the students read the assignment individually.

Be sure the students understand that the numbers in the table are given in thousands. That means that when you see 1,515 in the table it means 1,517 thousand or 1,517,000.

Put students in groups of two to four students to work on the investigation.

#### Doing the Investigation

• Question: Are there more people who are 12 through 17 years old who play golf or more people who are 55 through 64 years old who play golf?
(Contestant's Answer: There are more people who are 55 through 64 years old who play golf than people who are 12 through 17 years old who play golf.)

• Question: Are there more people who are 7 through 11 years old who play table tennis or more people who are 25 through 34 years old who play table tennis?
(Contestant's Answer: There are more people who are 25 through 44 years old who play table tennis than people who are 7 through 11 years old who play table tennis.)

• Question: Are there more people who are 7 through 11 years old who ride scooters or more people who are 7 through 11 years old who throw darts?
(Contestant's Answer: There are more people who are 7 through 11 years old who throw darts than people who are 7 through 11 years old who ride scooters.)