CONCEPT ATTAINMENT MODEL

Name of school                      :                                                          Standard             :        VIII Name of teacher                    :          Lakshmi L                               Date                    : Subject                                     :          Physics                                   Duration             : Unit                                           :          force Subunit                                     :          Contact force

                                                             

1.      Name of concept                                  :                     Contact force

2.      Definition of the concept                   :      The force applied on an object by contact is called

                                                                               contact force

3.      Essential attributes                              :           Magnitude of force, nature of the surface

4.      Non-essential attributes                     :           temperature, color of the object, position of the

                                                                              Object.

5.      Preparation of exemplars    

 

Positive exemplars                                          Negative exemplars

       A child pulls a table                                             A man stand with a load on his head

       A batsman hits a ball                                           falling of mango

       A man pulling a cart                                            Magnet attracts nail

       A boy pushes the car                                            Attraction of earth on moon

       Hammering the nail                                            the nucleus of an atom attracts electrons

6.      Instructional effects

a)      Competence for close, meaningful observation of examples and non-examples leading to attribute analysis.

b)      Ability to identify the essential attributes of the number of the category.

c)      Competency in generating meaningful hypothesis regarding the new category.

d)      Practice of testing hypothesis formed in the light of new examples.

e)      Skill of categorizing the items observed on the basis of essential attributes.

f)       Skill to define the category formed in terms of essential attributes.

Ability to generate new examples independently and to list the acceptability

7.      Nurturant effects

a)      Acquires sensitivity to logical reasoning

b)      Becoming tolerant to ambiguity.

c)      Developing positive attributes towards alternative perspectives.

 

SYNTAX Phase   1 Presentation of data and concept identification
T:                     S: S: T:       S:   T:     S: T:       S:   T: S: T:    S:   T:                   S:   T: S: T:	Dear students we are going to play a game. I have a concept in my mind.  I will provide you some positive examples for the concept in my mind and some negative examples which do not bear the characteristics of the concept. All the yes example have some attributes in common. By comparing the examples you have to identify the concept in my mind, its characteristics and suggest some more examples. Moreover based on the attributes you have to define the concept. Here is the pair of positive and negative examples.     A child pulls a table (+ve)     A child standing with a load on his head. (-ve) Something that a child can do Something related to motion Now listen, there is your second set of examples.     A batsman hit the ball (+ve)     A man standing with a load (-ve)   Something related to motion of an object.   If so check the next set of examples     A man dragging a bag (+ve).     Falling of mango from tree (-ve). Something related to force. Let us see the next set of examples     A man pulling the cart (+ve).     A magnets attracts a nail (-ve).   In all the positive examples force is applied by contact.   You are absolutely correct. Can you name the concept? No teacher All right, I will tell you. This is known as contact force. Can you list the attributes of contact force? Magnitude of the force applied.   Very good.           The force applied on the object by contact is called contact force.                                In the above mentioned positive position of the object is a non-essential attribute. Can you suggest some other non-essential attributes? Color of the object.   Anything more? Quantity of the object. Absolutely right.	The teacher presents the first pair of labeled examples Hypothesis 1 Hypothesis 2   The teacher presents the second set of labelled examples. Hypothesis 1 rejected Hypothesis 2 persist Teacher presents the third set of examples.   Hypothesis 3   The teacher presents the fourth pair of labelled examples. Hypothesis four is formed.     Teacher name the concept. Students list the essential attributes.             The teacher states the concept.     Students list the non-essential attributes.
Phase 2 Testing the attainment of concept
T:         S:   T:     S:   T:      S:   T: S:	Now I am going to check your knowledge about contact force. I will give you a set of examples from which you should identify the YES examples and NO examples.     Pushing the wall and     Earth attracts moon Pushing the wall – yes Attraction of earth on moon – no Now listen the next examples.     Hammering a nail on a wall.     Revolution of planets around sun     Hammering nail on a wall – yes     Revolution of planets around sun – no Now listen the next examples     Stretching the rubber band.     The nucleus of an atom attracts electrons.  Stretching the rubber band – yes The nucleus of an atom attracts electrons – no Very good. Can you define contact force? The force applied on a body by contact is called contact force.	Students label the unlabeled examples       Students label the unlabeled examples       Students label the unlabeled examples   Students state the concept.
Phase 3 Analysis of thinking strategy
T: S:           T: S:     T: S:	Can you explain how did you reach at our conclusion? Teacher your firs positive examples of child pulls a table and a man carrying a load make as to think that the concept may be something related to motion and also which can be done by a child. But when you provide the next positive example that hypothesis was rejected.     What about the next examples? When you told about falling of a mango from a tree as negative example we thought that the concept was related to something like force and also involves motion. Then how will you reached at the final conclusion? We analyzed the positive and negative examples again and again. On comparing, we come to identify in all the positive examples force is applied by contact. Thus we arrived at the concept of contact force.	Students describes the thought.