Correct Answer - Option 4 : Model
Three-dimensional aids are used with great effectiveness as teaching aids.
- All the audio-visual materials or three-dimensional aids are nearest to living experiences.
- They are contrived experiences where reality is altered or simplified for teaching purposes.
Model:-
- A model is a three-dimensional representation of a real thing.
- Models are a concrete representation of subjects, their size being adjusted to make it handy and conveniently observable.
- They are mostly three-dimensional or sections and clearly exhibit the structure of functions of the original.
- They represent real things in all respects except size and shape. Large objects are reduced to a small size so that they could be observed by students with greater precision.
- Models may be simple (static), sectional or working.
- Models simplify complex things.
Hence, we can conclude that model is a three-dimensional Aid.
Wall blackboard, display board, and still pictures are two-dimensional aids. These are the most common instructional aids used in classrooms.
- Bulletin boards are a type of display board that is more of a non-projected visual aid. They contain student contributions that should be well-labeled and encouraged.
- Chalk-board: It is one of the most valuable and widely used inexpensive teaching aid. The principal function of the blackboard is to show the written forms of the language items being taught in such a way that the whole class can see them at once.
- Still Picture is the static teaching aids that are used to show the process, image, etc in a static form.
