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Subject: Mathematics
Semester: 2
Period: 5
Week: 26
School Name:
Teacher’s Name:
Subject: Mathematics
Grade Level: Grade 4
Date: Week 26
Lesson Duration: 45 minutes
Week & Period: Week 26, Period 5
Topic: Customary Units of Length
Sub-topic: Measuring in inches, feet, yards, and miles
Learning Objectives
By the end of the lesson, students should be able to:
- Estimate lengths in customary units.
- Measure objects using inches, feet, yards, and miles.
- Compare the lengths of different objects.
Previous Knowledge
Students already know how to measure with a ruler in centimeters.
Instructional Materials
Mathematics textbook for Grade 4, rulers (inches, feet), measuring tape, chalkboard.
Lesson Development – ABC Model
A – Anticipation (Warm-up / Starter)
Time: 5–10 minutes
Teacher asks: “Which is longer: a pencil or the classroom?” Learners discuss.
B – Building Knowledge (Main Lesson Body)
Time: 25–30 minutes
🔍 Key Definition (Expanded)
Customary Units of Length refer to the standard units used to measure length and distance in the United States customary system. The four main units include:
- Inch (in) – the smallest standard unit; used for small objects.
- Foot (ft) – 1 foot = 12 inches. Commonly used to measure furniture, height, etc.
- Yard (yd) – 1 yard = 3 feet = 36 inches. Used for room dimensions, sports fields, etc.
- Mile (mi) – 1 mile = 1,760 yards = 5,280 feet. Used for long distances like city-to-city travel.
📐 Conversions to Know
|
Unit |
Equals |
|
1 foot |
12 inches |
|
1 yard |
3 feet or 36 inches |
|
1 mile |
1,760 yards or 5,280 feet |
🧠 Examples (Expanded)
|
Object or Distance |
Estimated Length |
|
Pen or pencil |
About 6 inches |
|
Notebook |
About 11 inches |
|
Student desk |
About 3 feet |
|
Teacher’s table |
About 5 feet |
|
Classroom from wall to wall |
About 10 yards |
|
School hallway |
About 15–20 yards |
|
Playground length |
About 30–50 yards |
|
Distance to nearby town |
About 5 miles |
|
Road trip between cities |
50–100 miles |
🧍♂️ Learners’ Activities (Expanded & Interactive)
- Hands-On Measuring
- Students use rulers (inches/feet) and measuring tapes (feet/yards).
- Assign each group 4–5 classroom objects to measure (e.g., desk, chair, whiteboard, backpack, door).
- Students record both estimated and actual measurements.
- Unit Match-Up
- Teacher prepares cards with objects and separate cards with units (inch, foot, yard, mile).
- Students match the object to the most appropriate unit.
- Example: “Whiteboard” → “Yard” vs. “Pencil” → “Inch”
- Measurement Comparison Activity
- In pairs or small groups, students compare measured items:
- "Which is longer, the desk or the door?"
- "How many pens (6 in) fit in the length of the whiteboard (72 in)?"
- Estimation Relay
- Place mystery objects (hidden behind a curtain or box).
- Students guess the length in inches or feet, then measure to see how close they were.
- Distance Estimation Walk (Optional for Outdoors)
- Students estimate the distance from the classroom to another point in the school (e.g., playground).
- Use yard or feet estimations, then measure with a yard measuring wheel or tape.
✅ Assessment Checks (Expanded)
Quick Oral Checks:
- "How many inches are in a foot?"
→ 12 inches - "How many feet are in a yard?"
→ 3 feet - "Which is longer: 1 yard or 30 inches?"
→ 1 yard (36 inches) - "What unit would you use to measure a football field?"
→ Yards - "Would you use inches or miles to measure the distance to a different city?"
→ Miles
Short Written Questions:
- Convert the following:
- 2 feet = ___ inches
- 4 yards = ___ feet
- 3 miles = ___ yards
- Compare:
- Which is longer: 60 inches or 5 feet?
- Is 1 mile longer than 1,000 yards?
📝 Teacher Notes (Expanded & Detailed)
- Stress conceptual understanding:
- Focus on the relative sizes of units (e.g., "a foot is bigger than an inch", "a yard is bigger than a foot", "a mile is much bigger than a yard").
- Use visuals and body references to help students connect:
- "An inch is about the width of your thumb."
- "A foot is roughly the length of your forearm."
- "A yard is about the length from your nose to your fingertips when you stretch your arm."
- Build fluency in conversions:
- Reinforce key relationships:
- 12 inches = 1 foot
- 3 feet = 1 yard
- 1,760 yards = 1 mile
- Practice both upward and downward conversions.
- Make real-world connections:
- Bring up real-life measurement tasks: height charts, road signs (miles), fabric measurement (yards), carpentry (feet/inches).
- Scaffold vocabulary:
- Build familiarity with unit abbreviations (in, ft, yd, mi).
- Use sentence frames:
- “This ______ is about ___ long.”
- “I would use ____ to measure a ______.”
📘 Optional Extension / Homework
- "Measurement Scavenger Hunt":
Students find five objects at home and estimate + measure their lengths. They record the item, estimated length, actual length, and unit used. - Worksheet (or Quiz):
A mix of: - Matching units to objects
- Conversion problems
- Short answer on unit relationships
C – Consolidation (Conclusion & Assessment)
Time: 5–10 minutes
Summary: Customary units of length include inches, feet, yards, and miles.
Evaluation Method (Expanded)
Exit slip/quiz: Students write which unit is best to measure (a book, a road, a school field).
Assignment (Expanded)
At home, measure the length of your bed in feet and in inches.
Follow-up Activity
Students will compare measurements of their desks in groups.
Differentiation / Inclusive Strategies
Give rulers with larger markings for learners with vision difficulty. Group work for peer support.
Teacher’s Reflection (After Class)
What worked well? ___________________________________________
What needs improvement? ____________________________________
Students’ engagement level: ☑ High ☑ Medium ☑ Low