Lesson Exemplar for Mathematics 1 Quarter 2 Lesson 1 Lesson Exemplar for Mathematics Grade 8 Quarter 2: Lesson 1 (Week 1) SY 2025-2026 This material is intended exclusively for the use of teachers participating in the pilot implementation of the MATATAG K to 10 Curriculum during the School Year 2024-2025. It aims to assist in delivering the curriculum content, standards, and lesson competencies. Any unauthorized reproduction, distribution, modification, or utilization of this material beyond the designated scope is strictly prohibited and may result in appropriate legal actions and disciplinary measures. Borrowed content included in this material are owned by their respective copyright holders. Every effort has been made to locate and obtain permission to use these materials from their respective copyright owners. The publisher and development team do not represent nor claim ownership over them. Development Team Writer: Yahweh M. Pasahol (Pedro Guevara Memorial National High School) Validator: Roldan S. Cardona (Philippine Normal University – North Luzon) Management Team Philippine Normal University Research Institute for Teacher Quality SiMERR National Research Centre Every care has been taken to ensure the accuracy of the information provided in this material. For inquiries or feedback, please write or call the Office of the Director of the Bureau of Learning Resources via telephone numbers (02) 8634-1072 and 8631-6922 or by email at blr.od@deped.gov.ph. MATHEMATICS / QUARTER 2 / GRADE 8 I. CURRICULUM CONTENT, STANDARDS, AND LESSON COMPETENCIES A. Content Standards The learners demonstrate knowledge and understanding of plotting points, and finding distance and the midpoint of line segments on the Cartesian coordinate plane. B. Performance Standards By the end of the quarter, the learners are able to plot points, find the distance between two points, and find the midpoint of line segments, on the Cartesian coordinate plane. (NA) C. Learning Competencies and Objectives Learning Competency At the end of the lesson, the learners are able to: 1. illustrate and describe the Cartesian coordinate plane. Lesson Objective 1: Illustrate a Cartesian coordinate plane. Lesson Objective 2: Identify each part of a Cartesian plane. Lesson Objective 3: Define a Cartesian plane and describe each part. 2. plot points on the Cartesian coordinate plane and determine the coordinates of a point on the plane. Lesson Objective 1: Understand that the coordinate grid is used to describe the location of a point in the Cartesian plane. Lesson Objective 2: Plot points on a Cartesian plane. Lesson Objective 3: Write ordered pairs to describe the location of points in a Cartesian plane. Lesson Objective 4: Understand four distinct quadrants in the coordinate plane. Lesson Objective 5: Identify the location of a point in a Cartesian plane. D. Content 1. Cartesian coordinate plane including its parts. 2. Points on the Cartesian coordinate plane. 3. Coordinates of a point on the Cartesian plane. 4. Location of a point on the Cartesian plane. E. Integration II. LEARNING RESOURCES Alferez, M. S. (2007). MSA Elementary Algebra (2007 ed.). Quezon City. https://cdn.slidesharecdn.com/ss_thumbnails/poster-130606213607-phpapp01-thumbnail.jpg?width=560&fit=bounds K5 Learning, (2022, July 27). Grade 5 integers number line. https://www.k5learning.com/free-math-worksheets/fifth-grade-5/integers Kuta Soft ware – Infinite Geometry. (2012). 3-Points in the Coordinate Plane.pdf. https://cdn.kutasoftware.com/Worksheets/Geo/3Points%20in%20the%20Coordinate%20Plane.pdf 1 Math Bondi. (2024). Parts of a coordinate plane notes. Teachers Pay Teachers. https://www.teacherspayteachers.com/Product/Parts-of-aCoordinate-Plane-Notes-6986541?st=78ba1cf56bd02256f79a3040724f84bc Nagwa Label. (2024). Lesson Plan: Coordinate Planes | Nagwa. Nagwa_Label. https://www.nagwa.com/en/plans/645121802137/ Nagwa_Label. (2024). Lesson Plan: The Coordinate Plane: First Quadrant | Nagwa. Nagwa_Label. https://www.nagwa.com/en/plans/390145919494/ Nagwa_Label. (2024). Lesson Plan: The Coordinate Plane: Four Quadrants | Nagwa. Nagwa_Label. https://www.nagwa.com/en/plans/425148312362/ Nivera, G., PhD. (2018). Grade 8 Mathematics Patterns and Practicalities. Makati City. Oronce, O. A. (2007). E-math I' 2007 Ed. (elementary algebra) (1st ed.). Sampaloc,Manila. III. TEACHING AND LEARNING PROCEDURE A. Activating Prior Knowledge NOTES TO TEACHERS DAY 1 1. Short Review A. Plot the given integers on the number line. Use the letters to represent the Answer Key: given integers. A. A. 7 B. -1 C. 4 D. -6 E. 8 F. -3 G. 5 H. 11 I. -11 J. -2 B. Use the number line to determine the integer that is being described in the following: 1. 2 units to the right of 0 2. 1 unit to the left of 3 3. 7 units to the left of 2 4. 3 units to the right of 4 5. 1 unit to the left of -10 2 B. 1. 2 2. 2 3. -5 4. 4 5. -11 Questions: 1. What integer is usually positioned at the center of the number line from 10 to 10? 2. What integers are found on the left of zero of the number line from -10 to 10? 3. What integers are found on the right of zero? of the number line from -10 to 10? 1. 0 2. negative integers (-1,-2,-3,.. -10) 3. positive integers (1,2,3,..10) 2. Feedback (Optional) B. Establishing Lesson Purpose 1. Lesson Purpose Think about this! Since you are already familiar with the number line, draw a vertical number line in your notebook with integers from -10 to 10. 1. What do you think will be the integer in the middle of the vertical number line from -10 to 10? 2. Which integers do you think are placed above zero? 3. Which integers are placed below zero? 4. What if the horizontal and the vertical number lines are combined, what will it look like? 2. Unlocking Content Vocabulary CARTESIAN PLANE or RECTANGULAR COORDINATE PLANE – formed by two perpendicular number lines, one horizontal and one vertical that intersect at a point. It is named after Rene Descartes, a French mathematician, scientist, and philosopher who first developed it in the 1600s. X–AXIS – the horizontal number line. Y–AXIS – the vertical number line. ORIGIN – the point (0,0) or the point of intersection of the x-axis and the yaxis. QUADRANT – a region defined by the two axes (x-axis and y-axis) of the coordinate plane. There are four regions in a Cartesian plane which are numbered in a counterclockwise direction. ORDERED PAIR or COORDINATES – a pair of numbers that is used to represent a point on a Cartesian plane. ABSCISSA or X-COORDINATE – the horizontal distance from the y-axis. ORDINATE or Y-COORDINATE – the vertical distance from the x-axis. 3 Answer Key: 1. 0 2. positive integers from 1 to 10 3. negative integers from -1 to 10. 4. It will form perpendicular lines. C. Developing and Deepening Understanding SUB-TOPIC 1: Illustrate the Cartesian coordinate plane including its parts. 1. Explicitation Draw a horizontal number line. Label the integers on the number line. Draw a vertical number line perpendicular to your horizontal number line intersecting at zero. Label also the vertical number line with integers where the integers above the intersection zero are positive integers starting with +1 and those below zero are negative integers starting with -1. Questions: 1. What integers are located on the right of zero in the number lines? 2. What integers are located on the left of zero on the number lines? 3. What integers are located above zero on the number lines? 4. What integers are below zero on the number lines? 5. How will you name this illustration if the horizontal number line and the vertical number line are intersected perpendicularly? 2. Worked Example From the task you have made in the “Explicitation”, if the horizontal number line and the vertical number are combined, a Cartesian plane is formed. It can also be named as a rectangular coordinate plane. The Cartesian plane is named after Rene Descartes, a French mathematician, scientist, and philosopher who first introduced the coordinate system in the 1600s. In the Cartesian plane, the horizontal number line is known as the x-axis. The vertical number is the y-axis. The intersection of the x-axis and the y-axis is 4 Answer Key: 1. positive integers 2. negative integers 3. positive integers 4. negative integers 5. Cartesian coordinate plane called the origin. Observe that in the Cartesian plane, the x-axis and the y-axis divide the plane into four regions. Each region is called a quadrant. These quadrants are numbered in a counterclockwise direction. 3. Lesson Activity Activity 1: The Earth-Friendly Plan Use a graphing paper to perform Activity 1. Sample Illustration Earth Warriors Club Inc. has a plan of creating an ecological park in the rectangular lot they bought. Imagine you are the leader of the Sustainable Development Team and you are task to design the layout of the eco-park using a Cartesian plane. You have in mind that a small circular fishpond will be placed at the origin. Trees will be located in Quadrant I. This will help improve the quality of the air and can preserve the soil. Flowering plants will be placed in Quadrant IV. There will be picnic area surrounded by flowering plants in Quadrant III. A mini playground will be placed in Quadrant II. The mini playground will be surrounded by trees to give more shade to the place. Question: Have you designed the eco-park plan correctly based on the give data? SUB-TOPIC 2: Describe the Cartesian coordinate plane. 1. Explicitation A. In your own words, describe each term: 1. Cartesian Plane 2. X-Axis 3. Y-Axis 4. Origin 5. Quadrant Search image of Hemispheres on the world map. Sample figure: https://cdn.slidesharecdn.com/ss_thumbnails/poster-130606213607-phpapp01thumbnail.jpg?width=560&fit=bounds B. Observe the given illustration. 5 Search image: Upper left – playground Upper right – trees Lower left – park Lower right – garden Answer Key: 1. It is formed by two perpendicular number lines, the x-axis and the y-axis, that intersect at a point. 2. The horizontal number line 3. The vertical number line 4. The intersection of the x-axis and y-axis. Questions: 1. What does the picture tell us? 2. Which continents belong to the northeastern hemisphere? 3. Which continents belong to the northwest hemisphere? 4. Which continents belong to the southeastern hemisphere? 5. How can you exactly locate a country on the given map? 2. Worked Example The given map in the “Explicitation” is a real-life example of a Cartesian plane. Similar to the map, the Cartesian plane is divided into four quadrants. Similar to the map that you can locate a country, points can also be located in a Cartesian plane. Each point in the Cartesian plane can be identified by a pair of numbers called ordered pair. The first number in an ordered pair is called abscissa or x-coordinate. It denotes the distance of the point from the y-axis. The second number in the ordered pair is the ordinate or the y-coordinate. It is the distance of the point from the x-axis. 5. The region formed from intersection of the x-axis and the y-axis Answer Key: 1. The map which represents the location of a continent in a hemisphere. 2. Europe, Africa, Asia 3. North America 4. Australia 5. Using the latitude and longitude in the map. In the illustration, each quadrant is shaded with different colors to easily identify the regions bounded by each quadrant. Questions: 1. What are the values of the abscissa and the ordinate in the first quadrant or Quadrant I? 2. What are the values of the abscissa and the ordinate in the second quadrant or Quadrant II? 3. What are the values of the abscissa and the ordinate in the third quadrant or Quadrant III? 4. What are the values of the abscissa and the ordinate in the fourth quadrant or Quadrant IV? Answer Key: 1. (+x, +y) 2. (-x, +y) 3. (-x, -y) 4. (+x, -y) 6 3. Lesson Activity Create your own Cartesian plane and include the values of the abscissa and the ordinate in each quadrant. DAY 2 SUB-TOPIC 3: Plot points on the Cartesian coordinate plane. 1. Explicitation Chess is a famous board game where two players compete to attack the opponent’s King. Here is an example of chess board game. In a chess game, the knight piece looks like a horse head. The white knight is moved by a player at (e, 6) since it is in column e and row 6. The black knight is moved by an opponent player at (a, 4) because it is in column a and row 4. Answer: Question: How can the chess game be related to points in the Cartesian plane? The chess board is similar to Cartesian plane because it also has its horizontal line or its row 2. Worked Example Similar to the chess pieces on a chess board, points can also be plot in the and the column is similar to the Cartesian plane. The column in the chess board is similar to the y-axis while the vertical line. row in the chess board represents the x-axis. The only thing that differ from a chess board and a Cartesian plane is that in the Cartesian plane location in the x-axis comes first followed by the location in the y-axis. Take Note that in each quadrant: Quadrant I (+x, +y) Quadrant II (-x, +y) Quadrant III (-x, -y) Quadrant IV (+x, -y) 7 Example 1: Plot the point (3,4). Steps: a) Start at the origin. b) Move 3 units to the right since in the point (3,4) the abscissa is 3. c) From 3, move 4 units upward since the ordinate in (3, 4) is 4. Example 2: Plot the point (-1, 2). Steps: a) Start at the origin. b) Move 1 unit to the left since in the point (-1,2) the abscissa is -1. c) From -1, move 2 units upward since the ordinate in (-1,2) is 2. Example 3: Plot the point (-2,-4). Steps: a) Start at the origin. b) Move 2 units to the left since in the point (-2,-4) the abscissa is -2. c) From -2, move 4 units downward since the ordinate in (-2,-4) is -4. (3,4) (-1, 2) (-2,-4) Example 4: Plot the point (3,-3). Steps: a) Start at the origin. b) Move 3 units to the right since in the point (3,-3) the abscissa is 3. c) From 3, move 3 units downward since the ordinate in (3,-3) is -3. Example 5: Plot the point (0,4). Steps: a) Start at the origin. (3,-3) (0,4) 8 Questions: 1) Are you going to move either to the right or to the left of the origin? 2) By how many units do you think you will move from the origin? Since the abscissa in (0,4) is zero, therefore you will not move neither to the right nor to the left. From the origin, move 4 units upward since the ordinate in (0,4) is 4. Example 6: Plot the point (-3,0). Steps: a) Start at the origin. b) From the origin, move 3 units to the left since in (-3,0), the abscissa is -3. (-3,0) Questions: 1) Are you going to move either upward or downward from -3? 2) By how many units do you think you will move from -3? Since the ordinate in (-3,0) is 0, then there will be no movement neither upward nor downward. Question: How will you plot the point (0,0) in the Cartesian plane? 3. Lesson Activity Activity 2: Playful Pet An animal is hiding in a Cartesian plane. To see it, plot the given points in a Cartesian plane. Use a graphing paper to easily create a Cartesian plane. Connect each point and its next consecutive point with a line segment. Points to be plot: 1. (-2,0) 16. (-5,5) 1. (-1,-1) 1. (5,-7) 16. (5,2) 2. (0,2) 17. (-6,6) 2. (-1,-2) 2. (7,-7) 17. (2,2) 3. (0,4) 18. (-7,6) 3. (0,-3) 3. (7,-6) 18. (1,1) 4. (2,6) 19. (-8,5) 4. (0,-6) 4. (6,-5) 19. (0,2) 5. (1,9) 20. (-8,3) 5. (-1,-7) 5. (6,-3) end 6. (-2,9) 21. (-7,2) 6. (-1,-8) 6. (7,-2) 7. (-1,7) 22. (-5,4) 7. (2,-8) 7. (7,0) 8. (0,7) 23. (-4,1) 8. (2,-4) 8. (8,3) 9. (0,6) 24. (-6,-1) 9. (2,-8) 9. (8,5) 9 Answer: 1) No. 2) There will be no movement to the right or left since the abscissa is 0. Answer: 1) No 2) There will be no movement upward or downward since the ordinate is 0. Answer: It is in the origin. 10. 11. 12. 13. 14. 15 (-2,6) (-2,7) (-4,10) (-7,10) (-6,8) (-5,8) 25. 26. 27. 28. (-4,1) (-3,0) (-2,0) end 10. 11. 12. 13. 14. (5,-8) (5,-7) (4,-6) (4,-3) end 10. 11. 12. 13. 14. 15. (5,9) (2,9) (3,8) (4,8) (7,4) (6,1) Question: What animal is it? Answer: It is a dog. DAY 3 SUB-TOPIC 4: Determine the coordinates of a point on the plane. 1. Explicitation Going back to the chess game. Questions: 1. Where do you think is white knight located? 2. What about the location of the black knight? 3. What helped you in finding the location of the knights in the chess board? 2. Worked Example Points in the Cartesian plane are the like the knights in the chess board. Just like the knights in the chess board at (g,7) and (d,3), the ordered pair or the coordinates that represents the point in the Cartesian plane can also be named. Always start at the origin. Count the number units that you moved from the origin to the given point. Take Note: If the abscissa is positive, it is on the right of the origin. If the abscissa is negative, then it is on the left of the origin. If the ordinate is positive, then it is moved upward. If the ordinate is negative, it is moved downward. 10 Answer Key: 1. White knight is at (g, 7). 2. Black knight is at (d, 3). 3. The column and the row of the chess board made it easy to locate the knights. Examples: Name the ordered pairs that represent the points in the Cartesian plane. Solution: 1. Point A has the coordinates (3,2) since from the origin, point was moved 3 units to the right and 2 units upward. 2. Point B has the coordinates (1,-1) since from the origin, the point was moved 1 unit to the right and 1 unit downward. 3. Point C has the coordinates (-2,3) since from the origin, the point was moved 2 units to the left and 3 units upward. 4. Point D has the coordinates (-4,-2) since from the origin, the point was moved 4 units to the left and 2 units downward. 5. Point E has the coordinates (0,0) since it did not moved neither to the right nor to left and no movement upward or downward from the origin. This means that the coordinates of the origin is (0,0). 6. Point F has the coordinates (0,-4) since from the origin, no movement was done to the left nor to the right but it moved 4 units downward. 7. Point G has the coordinates (4,0) since from the origin, the point was moved 4 units to the right but did not moved upward nor downward. 3. Lesson Activity Activity 3: Naming the coordinates of a point Name the coordinates of the following points in the Cartesian plane. Activity 3 Answer Key: A(2,5) K(1,1) B(-3,2) L(5,-4) C(6,0) M(3,3) D(-4,-5) N(-4,4) E((-5,0) O(0,-5) F(0,4) P(2,4) G(3,-5) Q(0,-1) H(0,0) R(4,2) I(-3,-3) S(1,-2) J(4,-2) T(-1,-2) 11 SUB-TOPIC 5: Determine the quadrant of a point on the plane. 1. Explicitation Using the map in the previous lesson, analyze each continent where they belong. Questions: 1. Where does most the South America continent belong to? Answer Key: 2. Where does the continent Asia belong to? 3. Is it also possible to locate points on the Cartesian plane just like the 1. South Western Hemisphere 2. North Eastern Hemisphere continents in the map? 3. Yes Search image of Hemispheres on the world map. Sample figure: https://cdn.slidesharecdn.com/ss_thumbnails/poster-130606213607-phpapp01thumbnail.jpg?width=560&fit=bounds 2. Worked Example Just like the continents in the map in the “Explicitation”, points in the Cartesian plane can also be located. Take note of the values of the abscissa and ordinate in each quadrant. Question: Why do you think that Roman Numerals are used for naming the quadrants and not the HinduArabic Numerals? Answer: To lessen confusion, the ordered pairs are written in Hindu-Arabic numerals, while the location of points is written as Roman Numerals. 12 Example 1: Identify the location of the following points in the Cartesian plane. Answers: Point A is located in Quadrant I. Point B is located in Quadrant IV. Point C is located in Quadrant II. Point D is located in Quadrant III. Point E is at the origin since it is in the intersection of the x-axis and the y-axis. Point F is not located in any of the quadrants because it is y-axis. Therefore, it is located in the y-axis. Point G is not located in any of the quadrants. It is located in the x-axis. Example 2: Given the ordered pairs, identify its location in the Cartesian plane. 1. (5,7) 6. (0,0) 2. (-4,-4) 7. (0,-6) 3. (9,0) 8. (3, 8) 4. (-1,1) 9. (-7, 0) 5. (3,-6) 10. (-2,4) Answers: 1. Quadrant I 6. origin 2. Quadrant III 7. y-axis 3. x-axis 8. Quadrant I 4. Quadrant II 9. x-axis 5. Quadrant IV 10. Quadrant II 3. Lesson Activity Activity 4. Indicate the location of the following points. 1. (-3,2) 6. (-5,0) 11. x = 0, y = 0 2. (2,6) 7. (-3,-1) 12. x > 0, y < 0 3. (-3,-5) 8. (1, 1) 13. x < 0, y < 0 4. (0,-7) 9. (4,0) 14. x = 0, y > 0 5. (2,-1) 10. (5,-4) 15. x > 0, y = 0 13 Activity 4 Answer Key: 1. Q II 6. x-axis 11.origin 2. Q I 7. Q III 12. Q IV 3. Q III 8. Q I 13. Q III 4. y-axis 9.x-axis 14.y-axis 5. Q IV 10. Q IV 15.x-axis D. Making Generalizations DAY 4 Learners’ Takeaways and Reflection on Learning Use the Frayer Diagram to show what you learned. IV. EVALUATING LEARNING: FORMATIVE ASSESSMENT AND TEACHER’S REFLECTION A. Evaluating Learning 1. Formative Assessment A. Fill in the blank with the correct answer. _____1. The vertical number line. _____2. The intersection of the horizontal and vertical number line. _____3. The horizontal number line. _____4. The region formed from the intersection of the x-axis and y-axis. _____5. The horizontal distance from the y-axis. _____6. The vertical distance from the y-axis. _____7. The coordinates of the origin. _____8. The location of a point when x < 0 and y > 0. _____9. The location of the point (5,0). 14 The teacher will ask the learners of the important lessons they’ve learned. NOTES TO TEACHERS Answer Keys: A. 1. y-axis 2. origin 3. x-axis 4. quadrant 5. abscissa or x-coordinate 6. ordinate or y-coordinate 7. (0,0) 8. Quadrant II 9. x-axis 10. Cartesian plane _____10. It is formed by two intersecting perpendicular lines. B. Give the coordinates of the following points. B. A (-4,4) B (0,0) C (-3,0) D (2,3) E (4,-2) C. Identify the location of the following points. 1. (-1, -1) 6. (5,8) 2. (-3, 0) 7. (-2,-3) 3. (6, -5) 8. (1, -1) 4. (0, -7) 9. (-3,-7) 5. (-4, 6) 10. (0,3) 11. x > 0, y > 0 12. x < 0, y > 0 13. x > 0, y < 0 14. x = 0, y = 0 15. x < 0, y = 0 2. Homework (Optional) Use the coordinate plane and your creativity to construct an image using the points in the Cartesian plane. Write the coordinates of each point you used for the chosen illustrated object. Color the object you chose to illustrate. Rubrics: Accuracy of naming the coordinates 10 points All points have complete and correct coordinates 9 points All points in the picture missed 1 to 3 correct coordinates Creativity and originality 10 points The object is original and artistically 9 points The object is artistically crafted but there are some 15 8 points All points in the picture missed more than 4 correct coordinates 8 points The object is quite vague to be identified. 7 points The picture has no label in the coordinates of the points. 7 points The art work is not finished so C. 1. Q III 2. x-axis 3. Q IV 4. y-axis 5. Q II F (0,-4) G (-4,-3) H (3,1) I (-1,2) J (1,-2) 6. QI 7. Q III 8. Q IV 9. Q III 10. y-axis 11. QI 12. QII 13.Q IV 14.origin 15. x-axis Neatness of work B. Teacher’s Remarks crafted in the Cartesian plane. 10 points The output is done neatly and orderly. Note observations on any of the following areas: similarities from online samples. 9 points The output has 1 to 3 erasures. 8 points The output has more than 4 erasures. the whole object is unclear. 7 points The output needs major revision due to many erasures. materials used The teacher may take note of some observations related to the effective practices and problems encountered after utilizing the different strategies, materials used, learner engagement, and other related stuff. learner engagement/ interaction Teachers may also suggest ways to improve the different activities explored/lesson exemplar. Effective Practices strategies explored Problems Encountered others C. Teacher’s Reflection Reflection guide or prompt can be on: principles behind the teaching What principles and beliefs informed my lesson? Why did I teach the lesson the way I did? students What roles did my students play in my lesson? What did my students learn? How did they learn? ways forward What could I have done differently? What can I explore in the next lesson? 16 Teacher’s reflection in every lesson conducted/facilitated is essential and necessary to improve practice. You may also consider this as an input for the LAC/Collab sessions.
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