lesson plan (lekshmim Mohan.N)

CONCEPT ATTAINMENT MODEL

LESSON TRANSCRIPT

Name of Teacher  :   Lekshmi Mohan.N                                                        standard: IX Name of school     :   C.M.G.H.S Poojappura                                                 Date:4/7/2014 Subject                  :   Physics Unit                      :   oscillations Sub-unit                :   periodic motion

I.    Name of the concept : Periodic Motion

II.  Definition of the concept: any motion that repeats itself at regular intervals of time is                                                                       known  as  periodic motion

III. Essential Attributes

1.      Time interval

2.      Repeated motion

IV. Non-Essential Attributes

            Duration,Shape and size of the object

V. Preparing exemplars

Positive exemplars	Negative exemplars
Motion of hour hand of a clock Motion of second hand of a clock Heart beat of a healthy person Motion of pendulum Rotation of earth Revolution of earth	Launching of rocket Boy running along a straight path Motion of bullet Falling of Mango Falling of Raindrops Crawling of snake

VI . Instructional Effects

1.      Competency for close , meaningful observation of examples non-examples leading to attribute analysis

2.      Ability to identify the essential attributes of the members of the category

3.      Competency to generating meaningful hypothesis regarding the new category

4.      Practice of testing hypothesis formed in the light of new examples

5.      Skill for categorising items observed on the basis of essential attributes and to justify

6.      Skill to define the category formed, in terms of essential attributes.

7.      Ability to generate new examples independently and to test the acceptability of them.

VII . Nurtural effects

1.      Acquires sensitivity to logical reasoning

2.      Becoming tolerant to ambiguities

3.      Developing positive attitude towards alternate perspectives.

PHASE 1     Presentation of data and concept identification     T :  Dear students , here we are going to play a game. I have a concept in my mind. I’ll provide you some positive exemplars ( YES example) for the concept in my mind and some negative exemplars ( NO example) which do not bear the characteristics of the concept. All  the YES exemplar have some attribute in common. By comparing the exemplars , you have to identify the concept in my mind , it's characteristics and suggest some more examples.Moreover based on the attributes , you have to define the concept. Here is a pair of +ve and –ve examples.      Motion of hour hand of clock ( +ve )      Launching of a rocket ( -ve ) Can you identify the motion?    S : Slow motion    S : Circular motion T : Now listen here is your second set of examples       Motion of second hand of a clock ( +ve )       Boy running along a straight path ( -ve )     S : It is surely circular motion   T : If so , check the next set of examples       Heart beat of a healthy person ( +ve )       Motion of a bullet ( -ve )     S : something that is not related to straight line motion ( translator motion )    S : Can you give some more examples?    T : Let us see the next set        Motion of pendulum ( +ve )        Falling of Mango ( -ve )     S : In all the positive examples the motion of the object repeats itself     T : You are absolutely right.Can you name the motion?     S : No teacher     T : All right, I’ll tell you. This is known as periodic motion Any motion that repeats itself at regular intervals of time is known as periodic motion PHASE 2 Testing attainment of the concept T : Now I am going to check your knowledge about periodic motion. I will give you a set of examples from which you should identify the 'YES' example and 'NO' example.      Revolution of earth and      Crawling of snake. S : Revolution of earth – YES      Crawling of snake – NO PHASE 3 Analysis of thinking stratergy T : Can you explain how did you reach your conclusion ? S : Teacher , your first +ve examples of motion of hour hand of a clock made us think that the concept might be something related to circular motion. The second example also confirms our hypothesis but then you provided the next +ve example of motion of a pendulum. Thus that hypothesis was rejected . T : Then how did you reach the correct conclusion  ? S : We analysed the +ve and –ve examples again and again. On comparing we came to identify that in all the +ve examples , the motion of the object repeat itself. Thus we arrived at the concept of periodic motion.

Orientation to the process Teacher presents the first pair of labeled examples. Hypothesis 1 Hypothesis 2 Teacher presents the second pair of labeled examples. Teacher presents the third set of labeled examples. Hypothesis 3. Teacher presents the fourth pair of labeled examples. Hypothesis 3 is rejected. Hypothesis 4 formed. Teacher name the concept. Student label the unlabelled examples.