Models

3D models are the av aids which is used for teaching purpose

1. MODELS

2. DEFINITION ‘A Model is a recognizable representation of real thing in 3D’. ‘It is a recognizable 3D representation of real thing or an abstract system’.

3. PURPOSE It can be used to reduce very large objects and enlarge very small objects to a size that can be observed and handled. It can be used to demonstrate the interior structure of objects or system with a clarity that is often not possible with 2D representation. It can be used to demonstrate movements.

4. It can be used to represent highly complex situation or process in a simplified way.

5. TYPES OF MODELS MODELS SOLID MODEL WORKING MODEL CROSS SECTIONAL MODEL/ CUT A WAY MODEL CONSTRUCTIONAL MODEL

6. SOLID MODEL It is a replica of an original thing, made with the same suitable material like clay, plaster of Paris, wood, iron…. ect It is used mainly for recognizing external feature. Eg : globe clay model of animal

7. 2.CROSS SECTIONAL MODEL It is the replica of the original thing to show internal parts. These are cutaway models which are used to enable the viewer to look into the inner design and structure of system. It is difficult to make in the educational institution. Because it need expertise work. Eg : cross section of human body parts

8. 3.WORKING MODEL It is designed to show actual working of organ or miniature of specific process. Various colours are also used to show different parts and how various parts are fitted to work or move together It is used to illustrate an operation or a working of big projects. Eg : motor cycle pump

9. 4.CONSTRUCTIONAL MODELS These are the models which are assembled and dissembled to show relationship of parts to whole. Eg : construction model of a home

10. IMPORTANCE OF MODELS IN TEACHING It enhance attention and interest of the students. There is a use of maximum senses. so it improve the level of understanding. It save time and effort. It helps to recall and fixing knowledge of the students.

11. It develop a scientific attitude to the students. It will helps to provide a direct experience to the students. It helps the teacher to improve the activities of the students.

12. ADVANTAGES Models heighten the reality of things and make learning direct and meaningful. Models illustrate the application side of certain principles and laws. It explains the complex operations in a simplified way and thus make comprehension easier. Models are lasting and ultimately work out to be cheaper teaching aid. It c an be make with the help of discarded materials like empty boxes, pins, clips, clay…… ect

13. It is easy to handle. It involve the use of all senses and thus make learning easier.

14. DISADVANTAGES It can’t be made in educational institution. It needs experts to construct. It can give a wrong impression and concept about the size of the real thing. Some models can be expensive. It can’t be applicable for a large population. It is usually too technical and time consuming for the constructor to build.

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