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. 1. 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

8. 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

11. 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

13. 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

16. 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.

17.  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.

18. 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 can be make with the help of discarded
materials like empty boxes, pins, clips,
clay……ect

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

20. 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.

21. THANK YOU