Lesson Plan in Elementary Mathematics Grade 4

8/3/2019 Lesson Plan in Elementary Mathematics Grade 4

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Lesson Plan in Elementary Mathematics Grade IV

Solving Problems on Perimeter

I. Learning Objectives

Cognitive: Solve word problems involving perimeter measurePsychomotor: Solve word problems with accuracyAffective: Participate actively in group work

II. Learning Content

Skills: Solving word problems involving perimeter measureReference: BEC-PELC IV.A.1.3.1

Mastering Mathematics 4 TX p.192-193;TM p. 129-131

Materials: picture chart, pocket chart, flashcards

Value: Cooperation and accuracy

III. Learning Experiences

A. Preparatory Activities

1. Drill

What formula do we use to find the perimeter of a:-rectangle -triangle -pentagon-square -rhombus -octagon

2. Review

What must be remembered in solving word problems?What are the steps?

3. Motivation

Who comes to school by just walking? How far do you walk fromyour home to the school? Do you know how to find it?

B. Developmental Activities

1. Presentation

Vince walked from his house to the school, then to the

market, and then back home. How far did he walk?


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a. What distances are given in the problem?b. What is asked in the problem?c. What is the word clue?d. What process is needed to solve the problem?e. What is the number sentence?f. What is the answer to the problem?

Another example:

What is asked? ______________________________________

What are given? _____________________________________

What is the process to be needed? ______________________

What is the mathematical sentence? _____________________

What is the answer? __________________________________

2. Fixing Skills

We will have our groupings now. What will you do while working?

Each group will solve a problem. Follow the steps inproblem solving. Post the manila paper on the board for checking.

a. First GroupSonny walked around a small basketball court. The

rectangular court is 8 meters long and 4 meters wide. What isthe perimeter of the rectangular court?

A rectangular lot has a length of 20 m and a width of 18 m.

What is it perimeter?


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b. Second GroupJay enclosed his vegetable garden with a fence. The five

sides of the garden measure 10, 12, 12, 14 and 8 meters

respectively. How long is the fence?

c. Third GroupAn equilateral triangle has a perimeter equal to the

perimeter of a rectangle whose length is 12 m and whose widthis 8.7 m. Find the measurements of the sides of the equilateraltriangle.

d. Fourth GroupA perimeter of a square is 48 cm. What is the length of one

side?

3. Generalization

How do we solve word problems? How do we get the perimeterof a polygon?

C. Application

Solve the word problem by yourself.

For your project in EPP, you make a square frame thatmeasures 45 centimeters on one side. What is theperimeter of the frame?

IV. Evaluation

Solve the word problems. Follow the steps in problem solving.

1. Jocelyns rectangular flower garden has a length of 10 meters anda width of 6 meters. Find the perimeter of the garden.

2. On one side of a square playground of San Isidro ElementarySchool measures 120 meters. How many meters of chicken wireare needed to enclose the playground?

To solve word problems, we follow the steps in solving word

problems and then apply the formula to find the perimeter of

a particular plane figure.


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3. There are 15 regular hexagonal poster frames in Willys gallery.Each side of the frame is 22 cm long. How much wood had beenused for the frames?

4. A rectangular tablecloth is 225 cm long and 95 cm wide. How longis the lace needed to put as an edging for the tablecloth?

5. A softball diamond is 20 meters long on each side. How manymeters does a player run if he a makes a homerun?

V. Assignment

A. Solve the following:1. Rex bought an octagonal mirror with each side measuring 25

cm. What is the perimeter of the mirror?2. Jelleni jogs around a triangular park which measures 425

meters, 350 meters, and 435 meters. How far will she jog if shegoes around the park twice?

B. Make 2 word problems involving any of the polygons learned.

Documents

Lesson Plan in Elementary Mathematics Grade 4