Detailed Lesson Plan in Mathematics 3 I- Objective: The Objective: The Grade 3 pupils should be able to identify and visualize symmetry in the environment and in design with 75% proficiency. II- Subject Matter: A. Content: Symmetry in the environment and in Design B. Reference: Mathematics Reference: Mathematics 3- Teachers Guide pp. 260- pp.263 C. Materials: picture of butterfly, scissors, chart, bond paper, drawing materials, manila paper and masking tape. D. Mathematical Concept and Skills: 1. Symmetry is when a figure has two sides that are mirror images of one another. 2. Construction of basic shapes such as squares, rect angles, triangles, circles E. Value Focus: Creativity Focus: Creativity III- Learning Procedure: Pupils Activity
Teacher’s Activity A. Preliminary Activities 1. Prayer Class, please stand and let us put ourselves in the presence of God. 2. Greetings Good Morning Class! 3. Checking of Attendance Who’s absent today? 4. Review Last time we discussed about the P erpendicular, Parallel and Intersecting Lines. Let’s have short review. What is Perpendicular line?
What is Parallel line?
How about the Intersecting lines?
In the name of the Father, Son, Holy Spirit …. Amen! (Our Father) Good morning ma’am! None ma’am
Perpendicular lines are lines intersect and form four right angles. Parallel lines are lines that do not me et Intersecting lines are lines meet at a common point but they do not necessarily form 90 degrees.
Very good! 5. Motivation Class, I have here a song, Fly, Fly the Butterfly. Are you familiar with this song? Okay, let us sing this song together…
Yes ma’am!
Fly, fly, fly the butterfly In the morning, it’s flying high In the meadow, it’s flying low Fly, fly, fly the butterfly What was the song all about? Very Good!
It’s all about the butterfly!
B. Developmental Activities 1. Presentation
What can you say about this picture Very Good! If I will fold this butterfly into two
Is the butterfly equally divided? And this is what we called Symmetry. When we say Symmetry is when a figure has two sides that are mirror images of one another. We can also draw a line trough a picture of butterfly and along either side the picture of butterfly would look exactly the same.
And this line would be called line symmetry.
Butterfly
Yes Ma’am!
2.Activity I will group you into four groups. Each group must observe the pictures and discuss if the pictures are symmetrical or not symmetrical GROUP 1 GROUP 1 NAME OF PICTURES
SYMMETRICAL OR NOT SYMMETRICAL
EXPLAIN
SYMMETRICAL OR NOT SYMMETRICAL
EXPLAIN
Bowling pin
bicycle
Bug
clock
GROUP 2 GROUP 2 NAME OF PICTURES
Scissors
Chair
Sunglasses
Flower
GROUP 3 GROUP 3 NAME OF PICTURES
SYMMETRICAL OR NOT SYMMETRICAL
EXPLAIN
SYMMETRICAL OR NOT SYMMETRICAL
EXPLAIN
Kettle
Hat
Table
Y
GROUP 4
GROUP 4
NAME OF PICTURES
Smiley face
Star
8
Dress
3.Analysis I have here a folded rectangle in this way.
What have you observed? Very Good! This rectangle does not show a line of symmetry.
Not equally folded
But if I fold it in another way?
What have you noticed? Does the folded part match perfectly with one another?
Yes ma’am
How do you call the folded line?
Line of Symmetry
Very Good! 4. Abstraction Again class, What is Symmetry? How do we know that a figure or object or shape is symmetrical?
What other examples in the environment can we find that show symmetry? 5. Application In your group earlier. I have here m agazines look through it and cut out objects that you think are symmetrical. Fold the cut-out pictures into two and check wether it is truly symmetrical. Then tape the cut-out pictures up on your manila paper and explain why you chose it.
Symmetry is when a figure has two parts that are mirror images of one another. A figure is symmetrical if you can draw a line through a picture of the object and along either side the image would look exactly the same.
Trees, Human face, etc……
IV-EVALUATION: Identify if it is a Symmetrical or Not Symmetrical.
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V- Assignment: Draw at least five symmetrical figures then show a line of symmetry.
Prepared by: Elena F. Barba Student Teacher
