Three Dimensional Aids:
all the AV materials, three dimensional aids are nearest to living experiences. These side, such as models and
Mook-ups are replies or reconstructionís of the real thing. They are contrived experiences where reality is altered or simplified
For teaching purposes. A simple classification of these aids is given below:-
Recognizable three-dimensional representation of real things.
Real things which have been removed as units from their natural setting.
Objects which are incomplete or which are representative of a group or class of similar objects.
Devices which are imitations of real things without involving similarity of appearance, the non-functioning
Parts that are unnecessary for understanding operational functions being omitted.
Three-dimensional scenes incorporating miniature objects and backgrounds in perspective.
- To recreate things from the past or the future.
- To reduce the size of things.
- To make model of things too small to examine.
- To made model of things from faraway places.
- To explain difficult concepts.
- To show working parts.
- To attract interests attention.
- To promote increased learner participation.
- To show some selected aspect of the whole in a simple elemental way.
- To present an immediate sensation.
- Time consuming.
- Requires extra talent.
- Is the model necessary on case you make use of the original.
- Could some other device portray the idea more effectively?
- Is the idea appropriate for representation in a model?
- Is each part of the model mad to the same scale proportionate in size?
- Are the important details of construction correct?
- Could wrong impressions of size, Colour and shape result from using this model?
- Does the model oversimplify the idea?
- If it is workable, will at standup under frequent use?
- If it is made locally, is the model likely to be worth the time, effort and money involved?
- If it is purchased, will the model be used often enough to justify the cost?