## Home on the Range

### Michelle Barlow

#### Description

Students learn how to find the range of a set of numbers by analyzing data.

#### Objectives

The student identifies the range in a set of numerical data.

#### Materials

-Chalk and Chalkboard
-Paper and pencils for each child
-A set of bathroom scales

#### Preparations

Secure a bathroom scale, paper and pencils for students.

#### Procedures

1. Write the word Range on the board and explain that the word range is the difference between the greatest and the least number in a set of numbers.

2. Write the following numbers on the board 43,57,49,53,89. Demonstrate for the class how to find the range of these numbers by subtracting 43 from 89.

3. Tell the students that they are now going to help you collect and analyze some data about some of the students in the class. Tell the students that this activity will be looking for the range from some numerical data.

4. Tell the class that you are going to need four volunteers that do not mind being weighed in front of the class.

5. Once you have four volunteers write their names on the board. Have each of the volunteers weigh themselves. Record each person's weight by their name.

6. Once all weights are recorded have the class find the range of the four weights. Students should pick out the largest weight and subtract the least weight from it.

7. Circulate to make certain that students understand how to find the range. If there are plenty of students that would like to weigh themeselves, you may want to repeat this activity a couple of times.

8. Tell the students that they will now practice finding the range of a set of numbers. Write the following sets of numbers on the board;
a.(18,25,40,20) b.( 27,45,31,19)
c.( 5,9,3,15) d.( 80,30,50,60)
e. (13,47,32,40) f.( 23,54,31,43)
g.( 53,77,62,59) h.( 43,56,45,51)
I. (22,33,44,55 ) j. (44,30,39,27)
9. Collect the students' papers to use for assessment purposes.

#### Assessments

Formatively assess students by circulating during the weight activity. If students are all understanding the concept of range then give the practice problems to be used as as assessment. Students who do not get 8 out 10 correct should receive feedback and additional practice time.

#### Extensions

This lesson could be extended by having students compare numerical data from their science readings or social studies test. For example, have students find the range of the ages of the presidents when they took office.