Around and Around We Go

Johnny WolfeSanta Rosa District Schools

Description

A POLYGON is a closed figure formed by line segments. The PERIMETER of a polygon is the sum of the lengths of its sides.

Objectives

Understands and explains the effects of addition, subtraction, multiplication and division on real numbers, including square roots, exponents, and appropriate inverse relationships.

Materials

-Overhead transparencies (if examples are to be worked on overhead) for AROUND AND AROUND WE GO (see associated file).
-AROUND AND AROUND WE GO Examples (see associated file)
-AROUND AND AROUND WE GO Worksheet (see associated file)
-AROUND AND AROUND WE GO Checklist (see associated file)

Preparations

1. Prepare transparencies (if teacher uses overhead for examples) for AROUND AND AROUND WE GO Examples. (See associated file.)

2. Have marking pens (for overhead).

3. Have AROUND AND AROUND WE GO Examples prepared and ready to demonstrate to students. (See associated file.)

4. Have enough copies of AROUND AND AROUND WE GO Worksheet for each student. (See attached file.)

5. Have enough copies of AROUND AND AROUND WE GO Checklist for each student. (See attached file.)

Procedures

This lesson will not cover multiplication or exponents.
Prior Knowledge: Students should be familiar with basic operation skills, such as addition, subtraction, multiplication, division, exponents, fractions, decimals, solving equations, and the four-step approach to problem solving.

1. Get students' attention by making the statement, “How many of you have ever mowed your lawn?” Get their responses and then ask, “Is there a difference in distance by going around the outer edges of the lawn (one time) as opposed to going back and forth until the lawn is cut?” Get their responses and make sure they understand the concept of perimeter and can distinguish it from area.

2. Introduce the formula for perimeter. (See attached file AROUND AND AROUND WE GO Examples.)

3. Work example #1 from AROUND AND AROUND WE GO Examples. (See attached file.) Answer student questions and comments.

4. Go over DISCUSSION QUESTION 1. (See attached file: AROUND AND AROUND WE GO Examples.)

5. Work example #2 from AROUND AND AROUND WE GO Examples. (See attached file.) Answer student questions and comments.

6. Work example #3 from AROUND AND AROUND WE GO Examples. (See attached file.)

7. Work example #4 from AROUND AND AROUND WE GO Examples. (See attached file.) Answer student questions and comments.

8. Work Example #5 from AROUND AND AROUND WE GO Examples. (See attached file.) Answer student questions and comments.

9. Work Example #6 from AROUND AND AROUND WE GO Examples. (See attached file.) Answer student questions and comments.

10. Distribute the AROUND AND AROUND WE GO Worksheet. (See attached file.) The students will write their responses on the worksheet.

11. Distribute the AROUND AND AROUND WE GO Checklist. (See attached file.)

12. Move from student to student observing the students work and lending assistance.

Assessments

Student worksheets will be taken up and scored using the checklist in the associated file.

Extensions

Give students a piece of string. Have them make different objects out of the string. See how many different shapes come from the same length of string.