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Subject: Mathematics
Semester: 2
Period: 5
Week: 25
School Name:
Teacher’s Name:
Subject: Mathematics
Grade Level: Grade 1
Date: Week 25
Lesson Duration: 45 minutes
Week & Period: Week 25, Period 5
Topic: Measurement
Sub-topic: Introduction to Measurement and Estimating Length
Learning Objectives
By the end of the lesson, students should be able to:
Explain the importance of measurement in daily life
Describe the concept of length
Estimate the length of objects using non-standard units (arms, feet, hands, strings)
Previous Knowledge
Students already know how to compare objects as big/small, tall/short, and long/short.
Instructional Materials
Mathematics textbook for Grade 1, strings, paper strips, rulers, chalkboard, copybooks
Lesson Development – ABC Model
A – Anticipation (Warm-up / Starter)
Time: 5–10 minutes
The teacher shows two sticks, one long and one short, and asks: “Which one is longer? Which one is shorter?”
Learners discuss and respond.
Teacher explains that today they will learn about measurement and how to estimate lengths.
B – Building Knowledge (Main Lesson Body)
Time: 25–30 minutes
Definition: Measurement is the process of finding out the size, length, weight, or amount of something.
Importance: Measurement helps us in our daily lives. For example:
Measuring cloth for sewing
Measuring wood for building
Measuring distance when playing or working
Measuring ingredients for cooking
Length: Length is how long or short an object is. We can estimate length using non-standard units such as:
Hands (e.g. the length of a desk in “hand spans”)
Feet (e.g. the length of the classroom in “footsteps”)
Arms (e.g. the blackboard measured in “arm lengths”)
Strings or paper strips
Examples:
Measure the class door using strips of paper.
Estimate classroom length using strides.
Compare textbooks and copybooks using rulers.
Learners’ Activities (Expanded):
Learners walk across the classroom and count steps to measure the length.
They use their hands to measure the blackboard.
They compare their copybook and textbook to see which is longer.
Assessment Checks:
What is measurement?
How can you measure the classroom using your body?
Which object is longer: your pencil or your ruler?
Notes (Expanded & Detailed):
Measurement is important in our lives. Length tells us how long something is. We can use our body or objects around us to estimate length. Non-standard units help us to compare objects before using standard tools like rulers.
C – Consolidation (Conclusion & Assessment)
Time: 5–10 minutes
Summary: Measurement is finding out the size or length of something. We can estimate using hands, arms, feet, and strings.
Evaluation Method (Expanded):
Exit slip/quiz: Learners answer: “What can you use to measure the blackboard without a ruler?”
Teacher will collect slips and provide oral feedback.
Assignment (Expanded):
At home, measure the length of your bed using footsteps. Write down the number of steps.
Follow-up Activity:
Learners bring strings from home to use for measuring classroom items.
Differentiation / Inclusive Strategies
Pair weaker learners with stronger ones during measurement tasks. Allow learners to demonstrate with objects they are comfortable with.
Teacher’s Reflection (After Class)
What worked well? ___________________________________________
What needs improvement? ____________________________________
Students’ engagement level: ☑ High ☑ Medium ☑ Low