Beacon Lesson Plan Library

Number Chameleon

Amy Gunn

Description

This lesson teaches students to express a quantity in a variety of ways; to understand whether relationships among fractions, decimals, and percents are equal; and to convert a number expressed in one form to another.

Objectives

The student expresses a given quantity in a variety of ways, such as fractions, decimals, or numbers expressed as percents.

The student knows whether numbers expressed in different forms are equal.

The student converts a number expressed in one form to its equivalent in another form.

Materials

-Worksheets included in the file attachment
-Teacher information and notes included in the attached file
-3 sheets of paper per student
-Scissors for student use
-Four quarters

Preparations

-Print file attachment
-Review lesson and teacher pages with notes
-Copy student worksheets
-Get materials ready

Procedures

Prior Knowledge: Student should be able to read and write fractions, decimals, and percents; students should be able to multiply and divide using decimals; and students should be able to round to the nearest hundredth.

Steps
1. Say: "Today, students we are going to learn about number chameleons. Just like the Chameleon lizard changes its color to be like its environment, but it is still a lizard, some numbers change their form to be like the numbers around them or to be in the form you need them, they are still the same amount."
Ask students: "Do you understand why 25 cents is called a quarter?" Allow for responses. Then say: "Let me show you!"

2. Hold up one quarter and ask students what it is. After getting the appropriate response, ask the students what the quarter equals in cents. After student response hold up (or draw on the board) four quarters. Ask the student what the four quarters equal. After receiving the appropriate response, praise the students for their knowledge and turn to the chalkboard. Draw 4 quarters on the chalkboard (if you did not do this earlier) and above them draw a dollar bill.

3. Say: "Four quarters equal one dollar. The quarters all have the same value, so that is like cutting the dollar into four equal parts (demonstrate this by drawing three lines on your dollar bill to make four equal parts). If we then took one dollar and divided it by four (do this on the board) we would get the number .25 which is read as 25 cents when talking about money. The definition of the word quarter is one of four equal parts; therefore, 25 cents is equal to a quarter. Today we are going to learn more about the relationship between fractions, decimals and percents."

4. Pass out worksheets to students.

5. Complete the example on the first worksheet with the students.

6. Pass out 3 sheets of paper and scissors to students

7. Together with students complete the assignment with sheet 1.

8. Ask for questions. Reteach and review as necessary.

9. Have students complete the tasks for sheets 2 and 3.

10. Go over answers for sheets 2 and 3. Allow students to share here. You may have students pair up and share their answers with a partner and then go over the correct answers.

11. Review and reteach as necessary.

12. Have students complete worksheet 2.

Assessments

As the students are working on their examples and problems on the first worksheet the teacher may formatively assess the students by evaluating their progress, answering questions and then reviewing correct answers with students.

On worksheet 2 students complete problems using prior knowledge and new knowledge introduced during the first part of this lesson. Students should be able to express a quantity in a variety of ways; decide whether relationships between fractions, decimals, and percents are equal; and convert numbers from one form to another. There is a percent of accuracy and chart at the bottom of the page.

Extensions

The Beacon Learning Center Student Web Lesson titled, On the Move is a good tool to review, reteach or provide further practice with writing and understanding decimals. See Weblink.

Web Links

Web supplement for Number Chameleon
On the Move

Attached Files

Teacher notes and work pages along with student worksheets.     File Extension: pdf

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