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Subject: General Science
Semester: 1
Period: 3
Week: 17
School Name:
Teacher’s Name:
Subject: General science
Grade Level: Grade 4
Date: Week 17
Lesson Duration: 45 minutes
Week & Period: Week 17, Period 3
Topic: Measurement
Sub-topic: Converting from One System to the Other
Learning Objectives
By the end of the lesson, students should be able to:
Convert between metric and imperial units of weight, volume, and length
Solve simple word problems on conversion
Apply conversions in real-life situations
Previous Knowledge
Students already know the basic differences between metric and imperial systems
Instructional Materials
Conversion tables, rulers, weighing scale, measuring cups, practice worksheets
Lesson Development – ABC Model
A – Anticipation (Warm-up / Starter)
Time: 5–10 minutes
Teacher asks: “If 1 inch = 2.54 cm, how many centimeters make 10 inches?” Learners try to answer. Teacher explains conversions.
B – Building Knowledge (Main Lesson Body)
Time: 25–30 minutes
Learners’ Activities (Expanded):
- Learners practice converting units between Metric and Imperial systems using teacher-provided examples:
- Weight: 1 kg ≈ 2.2 lb
- Volume: 1 L ≈ 33.8 fl.oz
- Length: 1 m ≈ 39.37 in
- Learners work in pairs to solve simple classwork questions such as:
- Convert 5 kg to pounds
- Convert 2 L to fluid ounces
- Convert 100 cm to inches
- Learners discuss in groups how conversions are useful in everyday life, e.g., following a recipe, measuring fabric, or understanding travel distances.
- Learners record their conversions and compare answers with classmates to check for accuracy.
Assessment Checks:
- Teacher gives quick oral conversion tasks and asks learners to respond. Examples:
- Convert 3 kg to pounds
- Convert 1 L to fl.oz
- Convert 50 cm to inches
- Teacher observes learners as they solve written conversion exercises to ensure understanding.
Notes (Expanded & Detailed):
- Conversion: Conversion means changing a value from one measurement system to another while keeping the quantity equivalent.
- Examples:
- Weight: 5 kg ≈ 11 lb, 2 lb ≈ 0.91 kg
- Volume: 2 L ≈ 67.6 fl.oz, 33.8 fl.oz ≈ 1 L
- Length: 100 cm ≈ 39.37 in, 1 m ≈ 39.37 in
- Key points for learners:
- Use conversion factors correctly
- Check units before and after converting
- Understanding conversions is useful for science experiments, cooking, shopping, and travel
Assignment/Homework:
- Convert the following:
- 3 kg to pounds
- 5 L to fl.oz
- 150 cm to inches
- Identify two items at home measured in Metric and two in Imperial units. Convert each to the other system.
- Draw a conversion chart showing at least three Metric units and their equivalent Imperial units.
C – Consolidation (Conclusion & Assessment)
Time: 5–10 minutes
Summary: Teacher reviews conversion examples and learners repeat key values.
Evaluation Method (Expanded):
Exit slip/quiz: Learners convert 2 meters into inches.
Assignment (Expanded):
Convert 3 kg into pounds, 2 liters into fluid ounces, and 12 inches into centimeters.
Follow-up Activity:
Learners check packaging of food or drinks at home to identify metric and imperial units and convert them.
Differentiation / Inclusive Strategies
Teacher uses step-by-step guided practice for slow learners, while quick learners are given real-life problem-solving tasks.
Teacher’s Reflection (After Class)
What worked well? ___________________________________________
What needs improvement? ____________________________________
Students’ engagement level: ☑ High ☑ Medium ☑ Low