1. LESSON TEMPLATE
Name of the teacher :ASWATHY ASOK Period :
Name of the school : Time :
Standard : VIII Date :
Subject : Mathematics Strength :
Unit : Congruent Triangles Average age : 13+
Topic : Congruency
Focus: Concept of congruency
Understanding the concept of congruency and discuss the problems
about that concept.
Social concept: For developing the concept of congruency, teacher present the
.paper cuttings, cardboard cuttings, chart, model, natural examples etc…The
pupils analyze the examples and develop the concept of congruency. After that
through the examples pupils solve the problems about the concept of congruency
.Here the teacher and pupils participate equally to develop the concept of
congruency.
Prnciple of reaction: Teacher encourages the pupils to develop the concept of
congruency through observation and classification.
Support system: Paper cuttings, coins, natural examples, geometric figures.etc

2. Classroom interaction procedure Responses
Phase 1: Collection and observations
Teacher present a group of examples for
pupils , then observe the examples and classify
them on the basis of their characteristics.

3. Classroom interaction procedure Responses
Phase 2: Classification
Teacher encourages the pupils to classify the
examples.
Stage 1
A B

4. Classroom interaction procedure Responses
A B

5. Classroom interaction procedure Responses
A B

6. Classroom interaction procedure Response
Teacher asked the pupil to again classify the
examples in box A
STAGE 2
A1 A2
A3 A4

7. Classroom interaction procedure Responses
A5 A6

8. Classroom interaction procedure Responses
Teacher asked the students to construct a
table based on placing of one over another.
STAGE 3
A7 A8

9. Classroom interaction procedure Responses
A7 A8

10. Classroom interaction procedure Responses
Phase 3: suggesting the base of
classification
Teacher asked the pupils; for what is the
basis for classification among these three
stages.
Phase 4: developing facts
Teacher asked to the students; “ what are
the concept can be formed from the box A7
STAGE 1
Basis on their productive
materials.
STAGE 2
On the basis of similar shapes.
STAGE 3
On the basis of similar shapes
and size.
They are geometric figures with
equal size and shapes.

11. Classroom interaction procedure Procedure
Phase 5:Concept formation
Teacher explains that “The figures which
have similar size and shapes are known as
congruent shapes”
Then how will you define congruency
Phase 6:Problem solving
Teacher gives additional problems for
students.
Find out the congruent figures from the
following.
The figures which have similar
size and shapes are known as
congruent shapes.
Students find out the congruent
figures

12. FOLLOWUP ACTIVITIES
To find out 4 pairs of natural examples for congruency ?