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Subject: Mathematics
Semester: 2
Period: 5
Week: 27
School Name:
Teacher’s Name:
Subject: Mathematics
Grade Level: Grade 3
Date: Week 27
Lesson Duration: 45 minutes
Week & Period: Week 27, Period 5
Topic: Measurement
Sub-topic: Perimeter, Area, and Volume
Learning Objectives
By the end of the lesson, students should be able to:
• Calculate perimeter of rectangles and squares
• Find the area of rectangles and squares
• Calculate volume of cubes and cuboids
Previous Knowledge
Students already know how to measure length using rulers.
Instructional Materials
Mathematics textbook for Grade 3, rulers, string, cardboard boxes.
Lesson Development – ABC Model
A – Anticipation (Warm-up / Starter)
Time: 5–10 minutes
Teacher asks: “How can we find how much space your table covers or how much space is inside a box?” Learners share guesses.
B – Building Knowledge (Main Lesson Body)
Time: 25–30 minutes
Definitions:
Perimeter is the total distance around a shape. Formula: P = 2(L + W)
Area is the space inside a flat shape. Formula: A = L × W
Volume is the space inside a solid object. Formula for cuboid: V = L × W × H
Examples:
• Rectangle with length = 5 cm and width = 3 cm
Perimeter = 2(5 + 3) = 16 cm
Area = 5 × 3 = 15 cm²
- Cube with side = 4 cm
Volume = 4 × 4 × 4 = 64 cm³
Learners’ Activities (Expanded):
• Use string and rulers to find perimeter of classroom objects.
• Measure desk/table tops to find area.
• Build cardboard boxes and calculate volume.
Assessment Checks:
• Teacher asks: What is the perimeter of a square with side 6 cm?
• Teacher asks learners to calculate the area of their notebooks.
Notes (Expanded & Detailed):
Perimeter measures distance around, area measures surface inside, and volume measures space inside a solid. Units: cm, cm², cm³.
C – Consolidation (Conclusion & Assessment)
Time: 5–10 minutes
Summary: Perimeter, area, and volume help us measure different kinds of space. We use formulas to calculate them.
Evaluation Method (Expanded):
Exit slip/quiz: Write formulas for perimeter, area, and volume.
Assignment (Expanded):
Find the perimeter and area of your bedroom floor (use approximate measures).
Follow-up Activity:
Draw and calculate area of two rectangles at home.
Differentiation / Inclusive Strategies
Teacher allows group activities for weaker learners. Objects are provided for tactile learners.
Teacher’s Reflection (After Class)
What worked well? ___________________________________________
What needs improvement? ____________________________________
Students’ engagement level: ☑ High ☑ Medium ☑ Low