Republic of the Philippines
Department of Education
Region VIII
Division of Samar
District of San Jorge
Blanca Aurora Integrated School
San Jorge, Samar
__________________________________________________
DETAILED LESSON PLAN IN SCIENCE 10
February 14, 2024
I. OBJECTIVES
A. Content Standard
The learners evaluate of algebraic expressions following substitution.
B. Performance Standards
The learners should be able to substitute into an algebraic expression to
evaluate the expression.
C. Learning Competencies
MELC-Based Objective:
Evaluate an algebraic expression given the values/s of the
variable/s
Specific Objectives:
Evaluate an algebraic expression by substitution.
II. CONTENT
Topic: Evaluating Algebraic Expressions.
III. LEARNING RESOURCES
References:
Mathematics 7 (Math Counts pp. 259-262)
Materials: slide deck, images, laptop, projector, hand outs / activity sheets
Subjects Integrated:
TLE
IV. PROCEDURE
Teacher’s Activity
A. Preliminary Activities
1. Prayer
Stand up and let us pray.
Roland, kindly lead the prayer.
2. Greetings
Good morning, everyone!
Please be seated.
3. Attendance
Ruil, kindly check and record
the attendance of your
classmates. How many are
Student’s Activity
Learners recite the prayer.
Good morning, sir Baltazar!
Thank you, sir!
Ruil will give the report on the
attendance of the class.
present and those who are
absent?
Thank you.
B. Review
Yesterday, we discussed how to
translate algebraic expressions from
words to symbols and vice versa.
Review Activity: Bagay Tayo
1. The teacher will divide the class
into three groups.
2. Distribute algebraic expression
in words and algebraic
expression in symbol form to
each group.
3. Set a timer and challenge
students to match the algebraic
expression in words and in
symbols.
4. Let representatives from
different groups post their
answer on the board.
words
symbol
5. Check if the answers are
correct.
The learners will perform the activity as
instructed.
words
symbol
Antibodies
Enzymes
Channels
in
Membranes
Hormones
Structural
Molecules
C. Motivation
Let us play a simple game. This game
is called Find the Connection.
The teacher will present the mechanics
of the game.
In this round, you can see up to 4
clues. I want to know what connects
them.
The learners will participate in the game.
If you can tell me the answer after only
one clue, you’ll get an incredible 5
points. After two clues, you’ll get 3
points, three clues gets you 2 points,
and all 4 will give you 1 point.
If you give a wrong answer or don’t
answer at all, I’ll give it to the other
team for a bonus.
D. Presentation
Show the definition of Evaluation and
how substitution be useful in evaluating
algebraic expression
Ask learners to read Evaluation and
substitution.
Today, we will evaluate algebraic
expression by substitution.
E. Activity
 To understand today’s lesson
the teacher will present 1 to 3
example on the board on how to
evaluate algebraic expression by
substitution.
Learners read Evaluation and
substitution.

Learners will pay attention to the
discussion.
F. Analysis
Now, let us compare DNA and RNA
through a Venn Diagram. This activity
will help us highlight the similarities
and differences between DNA and RNA.
Compare DNA and RNA by filling the
similarities and differences in the Venn
Diagram posted on the screen.
G. Abstraction
Learners’ answers may vary.
Now that you are finish performing
your activity. Let us emphasize the
comparison of DNA and RNA in terms
of their structure, components, and
function.
Comparison
Structure
Components
DNA
Double
stranded
helix
Sugar
deoxyribose,
phosphate
and
nucleotide
basis
RNA
Single
stranded
Sugar ribose,
phosphate
and
nucleotide
basis
A, U, C, G
Function
A, T, C, G
Stores
genetic
materials
Functions in
protein
synthesis
transcribing
and
translating
the genetic
code
1. What are the components of the
DNA and RNA molecule?
2. What nitrogenous base is found
in RNA but not in DNA?
3. How does the structure of DNA
differ from that of RNA? What is
the structural difference
between DNA and RNA?
The DNA and RNA are made up of three
components: namely:
a. sugar
b. phosphate group, and
c. nitrogenous base
Uracil
DNA and RNA are different in the
following:
a. DNA is double stranded while RNA is
single-stranded.
b. The sugar in DNA is deoxyribose
while that in RNA is ribose.
c. The nitrogen bases in DNA are
adenine (A), guanine (G), thymine (T)
and
cytosine (C). In RNA are adenine,
guanine, cytosine and uracil.
It is important that we remember the
key concepts of our lesson. Please read
them.
1. A DNA is a double helix
molecule composed of
complementary strands of
deoxyribonucleotides units. The
1.
A DNA is a double helix molecule
composed of complementary strands of
complementary base pairs of the
DNA are held by hydrogen
bonds.
2. RNA is single stranded.
3. Examples of RNA types include:
mRNA, rRNA and tRNA.
4. In DNA, adenine always bonds
with thymine, and cytosine
bonds with guanine. In RNA,
adenine bonds with uracil, and
cytosine bonds with guanine
G. Application
There are lots of useful applications of
DNA technology in today’s modern
times. One of these is the
biotechnological applications that
focuses on the enhancement of our
agricultural products through Genetic
Engineering and Agricultural
Biotechnology to sustain food security.
Show images of agricultural crops
which are genetically modified or
GMOs.
Pest Resistant Corn
1.
Golden Rice contains beta carotene,
the same vitamin A precursor that
makes carrots orange
2.
A cow that produces milk similar in
composition to that made by humans
deoxyribonucleotides units. The
complementary base pairs of the DNA
are held by hydrogen bonds.
2.
RNA is single stranded.
3.
Examples of RNA types include:
mRNA, rRNA and tRNA.
4.
In DNA, adenine always bonds
with thymine, and cytosine bonds with
guanine. In RNA, adenine bonds with
uracil, and cytosine bonds with guanine
3.
What do you think are the advantages
and disadvantages of these Genetically
Modified Organisms?
The advantages of GMOs are the
following:
1. Increased crop yield
2. Pest and disease resistance
3. Enhanced nutritional content
4. Environmental sustainability
Some disadvantages of GMOs are as
follows:
1. Negative environmental impact
2. Pose health risks
3. Socio-economic issues.
V. EVALUATION
1. What are the nitrogenous bases in DNA?
a. adenine, cytosine, uracil only
b. adenine, cytosine, thymine only
c. adenine, cytosine, guanine, thymine
d. adenine, cytosine, guanine, uracil
2. What is the molecule that serves as the “blueprint” of life?
a. deoxyribonucleic acid
b. messenger RNA
c. ribonucleic acid
d. transfer RNA
3. What is a common component found in both DNA and RNA molecules?
a) Adenine (A)
b) Thymine (T)
c) Deoxyribose sugar
d) Uracil (U)
4. What is the primary function of messenger RNA (mRNA) in the cell?
a) Carrying amino acids to the ribosomes
b) Serving as a template for protein synthesis
c) Transferring genetic information between cells
d) Initiating DNA replication
5. Which of the following statements correctly describes a structural difference
between DNA and RNA?
a) DNA contains ribose sugar, while RNA contains deoxyribose sugar.
b) DNA is typically single-stranded, while RNA is typically double-stranded.
c) DNA contains thymine as one of its bases, while RNA contains uracil.
d) DNA has a helical structure with a left-handed twist, while RNA has a righthanded twist.
Answer Key:
1. C
2. A
3. A
4. B
5. C
VI. ASSIGNMENT
Directions: Fill in the complimentary DNA strand using DNA base pairing rules.
The first three nitrogenous bases were paired already and given as examples.
Prepared by:
BALTAZAR B. ROSALES
Teacher III
Noted:
BETHANY T. BAGAS
Sec. Sch. Principal II
Part
I. Procedure
Details
1. Greet the class and take attendance. <br> 2. Share the day's
a. Preliminary
objective: "Today, we will learn how to evaluate an algebraic
Activities
expression by substitution."
b. Review
1. Briefly review key concepts from the previous lesson on algebraic
Previous
expressions (e.g., defining variables, constants, and terms). <br> 2.
Lesson
Ask a few students to provide examples of algebraic expressions.
1. Present a real-life scenario where evaluating an algebraic
expression is useful (e.g., calculating total cost based on a given
c. Motivation
formula). <br> 2. Ask students how they would approach solving
such a problem.
1. Introduce the concept of substitution in algebraic expressions.
d.
<br> 2. Explain the process of replacing variables with given values
Presentation to evaluate the expression. <br> 3. Provide a step-by-step example
on the board.
1. Distribute worksheets with various algebraic expressions and
specific values for variables. <br> 2. Instruct students to work
e. Activity
individually or in pairs to evaluate the expressions by substitution.
<br> 3. Encourage students to show their work and explain their
steps.
1. Review the answers as a class, discussing any common mistakes
f. Analysis
or misunderstandings. <br> 2. Ask volunteers to explain their
process and reasoning for one or two problems.
1. Summarize the key steps for evaluating algebraic expressions by
substitution. <br> 2. Highlight the importance of accuracy in
g. Abstraction
substitution and arithmetic operations. <br> 3. Ask students to
suggest other situations where substitution might be applied.
1. Administer a short quiz with several algebraic expressions to be
II. Evaluation evaluated by substitution. <br> 2. Collect and grade the quizzes to
assess student understanding and provide feedback.
Subject
Integration Example
Physics: Use algebraic expressions to calculate physical quantities
like force, velocity, and acceleration. Students can substitute given
Science
values into formulas to solve problems. <br> Chemistry: Evaluate
expressions related to chemical reactions and concentrations, such
as calculating the amount of a substance produced or consumed.
Budgeting: Use algebraic expressions to model and analyze
financial scenarios, such as calculating total costs or profits based
Economics
on variable expenses and revenues. <br> Supply and Demand:
Evaluate expressions representing supply and demand functions to
determine equilibrium points.
Programming: Incorporate substitution into coding exercises where
students need to replace variables with actual values to test and
Technology
debug programs. <br> Data Analysis: Use algebraic expressions in
spreadsheet software to perform calculations and analyze data
sets.
Architecture: Apply algebraic expressions to calculate dimensions
Art
and proportions in design projects. <br> Music: Evaluate
Part
Details
expressions related to musical rhythms and scales, where students
substitute values to understand patterns and sequences.
Fitness Tracking: Use algebraic expressions to calculate fitness
metrics, such as heart rate or calories burned during different
Physical
activities. <br> Sports Analysis: Evaluate performance statistics by
Education
substituting values into formulas to compare athletes'
performances.
Creative Writing: Incorporate algebraic expressions in story
problems or word problems where characters solve mathematical
Language Arts challenges. <br> Grammar: Create exercises where students
substitute different words or phrases into sentence structures to
understand syntax and grammar rules.
ontext
Integration Example
Crop Yield Calculation: Use algebraic expressions to calculate the
expected yield of a crop based on different variables such as
amount of fertilizer (f), water (w), and land area (a). For example: Y
= 2f + 3w + 4a, where Y represents the total crop yield. <br> Cost of
Farming
Production: Evaluate expressions to determine the total cost of
production by substituting different values for seeds, fertilizers,
and labor. For example: C = 50s + 20f + 30l, where C represents
the total cost, s is the number of seed bags, f is the amount of
fertilizer, and l is labor hours.
Fare Calculation: Use algebraic expressions to calculate the total
fare based on distance traveled (d) and additional charges (a). For
example: F = 10d + 5a, where F represents the total fare. <br> Fuel
Consumption: Evaluate expressions to determine fuel consumption
Tricycle
for different distances. For example: G = 0.2d, where G represents
Driving
the fuel consumed, and d is the distance traveled in kilometers.
<br> Earnings Calculation: Calculate total earnings based on the
number of trips (t) and average fare per trip (f). For example: E =
15t + 12f, where E represents total earnings.