A Detailed Lesson Plan
in Mathematics 8
Grade 8 - LILAC
I.
Objectives
At the end of the discussion, students are expected to:
a. Define if-then statement;
b. Transform a statement into an equivalent if-then statement;
c. Identify the hypothesis and conclusion of an “if-then” statement;
d. Create an if-then statement; and
e. Share his or her insights about consequences of doing certain things.
II. Subject Matter
A. Topic: If-then Statements
B. References: Mathematics Learner’s Module for Grade 8 (pp. 321-327)
C. Materials: PowerPoint presentation, printed materials
D. Strategy: Inductive Method
E. Skills to be developed: Defining, transforming, identifying, cooperating, and sharing
III. Procedure
Teacher’s Activity
Students’ Activity
A. Daily Routine
Good morning, class!
: Good morning, Ma’am!
Precious, kindly lead us a simple
prayer.
: (The student will lead a prayer)
Thank you, Precious.
Before you take your seats, kindly : (The students will do the task)
arrange your chairs and pick up any litters
under them if there’s any.
Attendance
present today?
Officer,
is
everyone
: Yes, Ma’am.
That’s good to hear.
B. Motivation
Before we start our lesson, let’s play a
game called “Maria Clara Says”.
Kindly read the mechanics, Reign Josh. : Mechanics
1. All the students will stand.
2. The teacher will flash different
statements that the students need
to follow.
3. The students will remain standing if
the statement fits to them,
otherwise sit down.
4. The student who remains standing
will be given 5,000 pesos.
Thank you, Reign Josh!
Is the mechanics clear, class? Are you
ready?
: Yes, Ma’am.
If so, let’s now begin.
1.IF you are from section
Lilac, THEN raise your right hand.
2.IF you play mobile
legends, THEN stomp your feet thrice.
3. IF your age is 13, THEN raise your
left hand.
4. IF your weight is greater than 35,
THEN snap your fingers twice.
5. IF the month of your birthday ends
with a ‘BER’, THEN clap your hands.
6. IF your name starts with letter
‘H’, THEN give me a thumbs up.
Congratulations, Hans!
C. Presentation of the Lesson
Let’s go back to the different
statements we had a while ago. What
have you noticed?
: There are common words like if and then.
That’s right!
As we can see, there are ifs and thens
in every statement and that will be our
main focus for today, IF-THEN
STATEMENTS.
D. Lesson Proper
What is all about if-then statements?
Kindly read the definition, Cielo.
Thank you!
: Also known as Conditional Statement.
An if-then statement is composed of two
clauses: the if-clause and the then-clause.
We can denote a letter for each
clause, p for the if-clause and q for the
then clause.
The statement is in the form, "If p
then q." Conditional statements are
formed by joining two statements p
and q using the words if and then. The
p statement is called the hypothesis
and the q statement is
called the conclusion.
The hypothesis is the part of a
conditional statement that follows “if”
The conclusion is the part of a
conditional statement that follows
“then”.
For deeper understanding, let’s have
an example.
Kindly read, Rendel.
: If you clean your room, then you can play
outside the house.
Thank you!
What do you think is our p or
hypothesis?
: You clean your room
Very Good!
What is our q or conclusion?
: You can play outside the house.
That’s right!
Let’s have another example. Kindly
read, Allieyah.
: If you are an Ilocano then you are friendly.
Correct!
Who would like to identify the p or
hypothesis? Yes, Christian?
: You are an Ilocano
Who would like to identify the q or
conclusion? Yes, Wilfred?
: You are friendly
Very Good!
If today is Thursday, then tomorrow is
Friday.
If you do your chores all week, then
you can get your allowance.
Is identifying the hypothesis and
conclusion clear to you, class?
: Hypothesis: Today is Thursday
Conclusion: Tomorrow is Friday.
: p: You do your chores all week
q: You can get your allowance.
: Yes, Ma’am!
That’s good to know!
Mind you class, there are some
conditional statements not written in
this form but you can rewrite them
using the if-then form.
How are we going to identify the
hypothesis and conclusion if we have
this kind of statement.
Igorots are artistic.
: If you are an Igorot then you are artistic.
Guitar players are musicians.
: If you are a guitar player then you are a
musician.
All right angles are congruent.
: If all the angles are right then they are
congruent.
Is there any question with regards to
transforming statement into if-then
form?
: None, Ma’am.
Very Good, Class!
E. Application
It seems like you have really
understood our lesson. And now, let’s
have an activity entitled, “She Knows
and I Know She Knows”.
Before we start, kindly read the
mechanics, Haveron.
: Mechanics:
1. The class will be divided into four
groups.
2. Each group will receive an envelope
that contains different illustrations.
3. Each group needs to create if-then
statements using those illustrations.
4. One representative will present their
output.
Note! The reporter/representative will
receive 5, 000 pesos and the best group will
receive 3,000 pesos each.
Is the mechanics clear to you class?
: Yes, Ma’am.
Well then, you may now start.
: (The students will present their output)
F. Valuing
(The photos/statements used in
previous activity will serve as guide)
Always remember that if you give
importance to your studies then you
will surely achieve your dream career.
G. Generalization
What is the other term for if-then
: Conditional Statement
statement?
A statement is composed of two
: If-clause and then clause
clauses, what are these?
The if clause is called? The then clause
: Hypothesis and conclusion.
is?
What letters are used to represent
: p is for hypothesis and q for conclusion.
hypothesis and conclusion?
Very good, class! Seems like you
really understood our lesson.
IV. Evaluation
Convert each statement to if-then form, then underline the hypothesis and encircle the conclusion.
1. Good citizens obey rules and regulations.
2. Filipinos are God-fearing people.
3. Studying hard gets high grades.
4. An honest student does not cheat during an examination.
5. You are safe if you are vaccinated.
V. Assignment
Identify the hypothesis and conclusion in the following statements.
1. If a polynomial has six sides, then it has three angles.
2. If 3x = 24, then x = 8.
Convert each statement to if-then form, then identify the hypothesis and the conclusion.
3. Triangle has three angles.
4. An eighteen-year-old Filipino can cast his/her vote during election.
5. National Disaster Risk Reduction Council volunteers are busy during calamities.