| Home | Lesson Study in Sri Lanka | Contact Us |
  
  
In Collaboration With
California State University
Fresno USA
 
 
The Ratnapura Research Lesson
(Research lesson: Identify fractions and learn how to add fractions)
(The Rathnapura Teachers)
 
Content Specialists from University of Colombo
(1) Miss Pushpani Amarasena
(2) Mr. P.M. Edirisinghe
(3) Mr. U. Prabhath Liyanage

Teachers
(1) Mr. D.S. Mahindapala-Sivali Central College, Ratnapura
(2) Mr. P.P.P. Kalubovila-Dharmapala College, Ratnapura
(3) Mr. P.N.P. Ajith Kumara- Sri Sumana College Ratnapura
(4) Ms. S.M.A.K. Anuruddhaka-St. Luke's college Ratnapura
(5) Mr. Aruna Obayawikkrama-Kumara College, Ratnapura
(6) Mr K.A.H. Kodithuwakku-Dharmapala College , Ratnapura

This group prepared Two Lessons and met six times to discuss, design and evaluate the lessons.
Lesson 1 was conducted at the Ratnapura Sivali Central College.
Lesson 2 was conducted at the Ratnapura Kumara College .
Lesson 1: Identify fractions and learn how to add fractions.
Lesson 2:A refinement on Lesson 1 (after peer evaluation and feedback)

The lesson consisted of two parts.
Part 1 of the Lesson:
Method
:

Step1
Students were broken in to six groups.

Step 2
The teacher , pasted a random collection of whole numbers and fractions on the black board using “stick –it”s. Thenn the teacher asked the students to identify which numbers are whole numbers and which numbers are fractions.

Step 3
Once identified, the teachers separated the numbers in to two boards “whole numbers” and “fractions”.

Step 4
Once classified, the teacher took one umber from the “whole numbers” lot and another number from the “fractions” lot and paired them off and put them in another board (Like etc.

Step 5
Then each group was given a white board and a marker pen and was then asked to represent a number in the third board (step 4), using any geometrical shapes that the group desired.

Step 6
The students were then taught how to add two fractions of the same numerator by using the shapes that they used to represent the fractions in step 4. The student learnt the a concept of addition of fractions using the “joining” of geometrical shapes that the students themselves created. Each group was asked to present the findings to all other groups

Part 2 of the lesson.
Step 1
Each group of students were given an identical collection of circles and squares.
Then some fraction addition problems were given

Step 2
The students cut the given squares and circles in to shapes that represented the given fractions and then did the addition of the fractions by joining the shapes.

Lesson 2
Using the mistakes and shortcomings of the lesson done, the teachers improved the lesson and again presented it to the students

Short term lesson goals achieved
• The students themselves discovered how to distinguish between fractions and whole numbers.

• Students were able to understand fractions through geometrical shapes that they themselves created and discovered the rules that govern the addition of fractions through a geometric intuition that they themselves created.

Long term goal expected
• Students to develop communication and work as a team
• Teachers to learn the importance of “designing” a lesson
• Teachers to get used to the concept of “open door classroom”