DETAILED LESSON PLAN IN MATHEMATICS 8
I. Objectives
At the end of the lesson, students should be able to:
1. Define undefined and defined terms in a mathematical system.
2. Differentiate between undefined and defined terms through examples.
3. Illustrate examples of undefined and defined terms in real life.
II. Subject Matter
Topic: Mathematical System (WLAS Quarter3Week1)
Materials:
PowerPoint presentation
Whiteboard and markers
Visual aids with diagrams of points, lines, and planes
Activity sheets
III. Procedure
A. Activity
Teacher’s Activity:
1. Greet the class and introduce the topic: "Today, we will explore the foundation of
mathematics by learning about undefined and defined terms."
2. Show a diagram on the board: a point, a line, and a plane.
3. Distribute Activity 1 worksheet:
Students must recall prior knowledge and define the terms point, line, and
plane in their own words.
Sample question: "Write one object from your environment that represents each
term."
Students’ Activity:
Write their answers on the worksheet within 5 minutes.
Share their responses with the class.
B. Analysis
Teacher’s Activity:
1. Discuss the terms based on student answers:
Point: An exact location in space, has no dimension.
Line: A set of points extending infinitely in both directions, one-dimensional.
Plane: A flat surface extending infinitely in all directions, two-dimensional.
2. Use diagrams to highlight differences and connections between these terms.
3. Ask probing questions to deepen understanding:
"Why do we call these terms undefined?"
"How do defined terms like angles and line segments relate to undefined
terms?"
Students’ Activity:
Answer teacher’s questions and participate in the discussion.
Observe diagrams and take notes.
C. Abstraction
Teacher’s Activity:
1. Summarize the lesson:
"Undefined terms are the building blocks of geometry. Defined terms, like
angles or circles, are based on these basic concepts."
2. Present examples:
Point: Tip of a pen.
Line: Edge of a ruler.
Plane: Surface of a table.
3. Ask students to suggest additional examples for each term.
Students’ Activity:
Suggest their own examples for points, lines, and planes.
D. Application
Teacher’s Activity:
1. Distribute Activity 2 worksheet:
Task: Identify examples of points, lines, and planes in a given picture of a
house interior.
Task: Classify given terms as undefined or defined.
2. Facilitate group sharing of answers.
Students’ Activity:
Complete the worksheet.
Share and compare answers in groups.
IV. Assessment
Answer the following in complete sentences:
1. What are undefined terms in mathematics? Give examples.
2. How are defined terms formed? Provide at least one example.
3. Identify if the following are undefined or defined terms:
Line segment
Plane
Ray
V. Assignment
Research and write about two postulates or theorems that use undefined terms in their
definitions. Provide real-life applications of each.
V. REMARKS
VI. REFLECTION
VII. OTHERS
A. No. of learners
who earned 80% in
the evaluation.
B. No. of learners
who require additional
activities for
remediation (Score
Below 80%).
C. Did the remedial
lessons work? No of
learners who have
caught up the lesson.
D. No. of learners
who continue to
require remediation.
E. Which of my
teaching strategies
worked well? Why did
these work?
F. What difficulties I
encounter which my
principal or supervisor
can help me solve?
G. What
innovation/localized
material did I
use/discover which I
wish to share with
other teachers?
Prepared by:
MARY JANE E. PAJARON
Teacher
Checked by:
BERNIE R. PAMPLONA
School Head
