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Subject: General Science
Semester: 1
Period: 3
Week: 16
School Name:
Teacher’s Name:
Subject: General science
Grade Level: Grade 4
Date: Week 16
Lesson Duration: 45 minutes
Week & Period: Week 16, Period 3
Topic: Measurement
Sub-topic: Comparing Values of Two Systems of Measurement (Metric vs English)
Learning Objectives
By the end of the lesson, students should be able to:
Differentiate between metric and imperial systems of measurement
Identify examples of metric and imperial units
Compare equivalent values between the two systems
Previous Knowledge
Students already know that weights and lengths can be expressed in grams, kilograms, centimeters, or inches
Instructional Materials
Conversion chart, ruler marked in cm and inches, weighing scale showing kg and lb, water bottle showing liters and fluid ounces
Lesson Development – ABC Model
A – Anticipation (Warm-up / Starter)
Time: 5–10 minutes
Teacher shows a bottle labeled 1 liter and another labeled 33.8 fl.oz and asks learners: “Are these different or the same?” Teacher introduces the concept of two systems of measurement.
B – Building Knowledge (Main Lesson Body)
Time: 25–30 minutes
Learners’ Activities (Expanded):
- Learners observe a side-by-side comparison of Metric and Imperial units displayed on the board or chart.
- Teacher explains and demonstrates common conversions:
- Length: 1 inch ≈ 2.54 cm
- Weight: 1 pound ≈ 454 grams, 1 kg ≈ 2.2 lb
- Volume: 1 liter ≈ 33.8 fluid ounces
- Learners practice matching examples using worksheets or flashcards: converting inches to centimeters, pounds to kilograms, liters to fluid ounces.
- Learners work in small groups to convert given measurements from one system to the other and discuss their answers.
- Learners discuss situations where one system is used over the other, such as cooking recipes (Imperial in some countries, Metric in others).
Assessment Checks:
- Teacher asks: “Name one metric unit.” (Expected answer: grams, liters, meters)
- Teacher asks: “Name one imperial unit.” (Expected answer: pounds, ounces, inches)
- Teacher observes learners as they convert units to ensure understanding of relationships between the two systems.
Notes (Expanded & Detailed):
- Metric system: Uses grams (g), kilograms (kg), liters (L), milliliters (ml), meters (m), and centimeters (cm).
- Imperial system: Uses pounds (lb), ounces (oz), inches (in), feet (ft), gallons (gal), fluid ounces (fl.oz).
- Key conversions:
- Weight: 1 kg ≈ 2.2 lb, 1 lb ≈ 454 g
- Length: 1 inch ≈ 2.54 cm, 1 foot ≈ 30.48 cm
- Volume: 1 L ≈ 33.8 fl.oz, 1 fl.oz ≈ 29.57 ml
- Practical tip: Knowing conversions helps in daily life, cooking, traveling, and science experiments.
Assignment/Homework:
- Convert 5 inches to centimeters and 10 centimeters to inches.
- Convert 2 kg to pounds and 5 pounds to kilograms.
- Find an example at home or in school where both Metric and Imperial units are used and record it in your notebook.
C – Consolidation (Conclusion & Assessment)
Time: 5–10 minutes
Summary: Teacher reviews main differences between the systems and examples of conversions.
Evaluation Method (Expanded):
Exit slip/quiz: Learners convert 1 kg to pounds.
Assignment (Expanded):
Write three metric-to-imperial conversions at home.
Follow-up Activity:
Learners compare common household measurements in both systems.
Differentiation / Inclusive Strategies
Teacher uses visual comparisons for slow learners and gives advanced conversion tasks to quick learners.
Teacher’s Reflection (After Class)
What worked well? ___________________________________________
What needs improvement? ____________________________________
Students’ engagement level: ☑ High ☑ Medium ☑ Low