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Subject: Mathematics
Semester: 2
Period: 6
Week: 31
School Name:
Teacher’s Name:
Subject: Mathematics
Grade Level: Grade 1
Date: Week 31
Lesson Duration: 45 minutes
Week & Period: Week 31, Period 6
Topic: Plane Shapes
Sub-topic: Sorting and Classifying Plane Shapes
Learning Objectives
By the end of the lesson, students should be able to:
- Define plane (2D) shapes.
- Identify and classify shapes based on the number of sides and corners.
- Group real-life objects into shape categories such as circles, rectangles, triangles, and squares.
Previous Knowledge
Students already know how to identify lines, corners, and some simple shapes in their environment.
Instructional Materials
Mathematics textbook for Grade 1, shape cutouts, paper drawings, classroom objects, chalkboard, ruler.
Lesson Development – ABC Model
A – Anticipation (Warm-up / Starter)
Time: 5–10 minutes
The teacher shows learners a ball, a book, and a door. Learners are asked what these objects look like in shape. Teacher introduces the word “plane shapes” and asks learners to clap if they see something round in the class (like a clock). This excites them and gets them ready for the new lesson.
B – Building Knowledge (Main Lesson Body)
Time: 25–30 minutes
A plane shape (2D shape) is a flat figure that we can draw on paper. They are different because of their sides and corners. Examples are:
Circle – no sides, no corners
Triangle – 3 sides, 3 corners
Square – 4 equal sides, 4 corners
Rectangle – 4 sides, opposite sides equal, 4 corners
The teacher explains how to sort shapes. For example, circles together, triangles together, rectangles together. The teacher shows paper cutouts of these shapes and places them in groups. Real-life examples: wheels are circles, doors are rectangles, roofs can be triangles.
Learners’ Activities (Expanded):
Learners work in groups to sort given cutouts into correct shape groups. They do a scavenger hunt in the classroom to identify real objects with shapes. They present findings (e.g. clock is a circle, window is a rectangle).
Assessment Checks:
What is a plane shape? How many sides does a triangle have? Give an example of a real-life object that looks like a circle.
Notes (Expanded & Detailed):
Plane shapes are flat figures. They are different based on their sides and corners. Circles have no corners. Triangles have 3 corners. Rectangles and squares have 4 corners. Sorting helps us group shapes that look alike.
C – Consolidation (Conclusion & Assessment)
Time: 5–10 minutes
Summary: Teacher reviews by asking learners to name shapes and group them correctly. A quick oral quiz is given where learners identify the shape of objects.
Evaluation Method (Expanded):
Exit slip/quiz: Draw one circle, one triangle, and one rectangle.
Teacher will collect slips and provide oral feedback.
Assignment (Expanded):
Draw 3 circles and 2 rectangles at home. Find 2 objects at home that look like a triangle.
Follow-up Activity:
Next class, learners will study triangles in detail.
Differentiation / Inclusive Strategies
Teacher supports slow learners with real objects while faster learners are challenged to classify more complex shapes.
Teacher’s Reflection (After Class)
What worked well? ___________________________________________
What needs improvement? ____________________________________
Students’ engagement level: ☑ High ☑ Medium ☑ Low