Graphic aids - Diagrams

GRAPHIC AIDS

Graphic aids are charts, diagrams, graphs, maps, flashcards, posters, pictures, photographs, leaflets, folders, pamphlets, cartoons and comics. They are two-dimensional materials having no depth which communicate facts, ideas and relationships clearly through words, lines, drawings, symbols and pictures. Graphic aids can serve many educational objectives for group teaching of 20 to 30 students. They help to:

1.     Visualise abstract concepts which are difficult to understand - concepts of size, rate of growth, inner structure of an object or machine etc.

2.     Reduce the amount of verbal talking and help in giving clear explanations; visuals in charts, graphs, diagrams and posters, cut down words.

3.     Present the information in a specific and systematic manner. Since majority of them are formal aids, they have to be very systematic and organised.

They are also popular because they are

1.     Comparatively less expensive.

2.     Easy to make as no technical skills are required. Regular teachers, with some knowledge of drawing and who desire to be creative can prepare them.

3.     Easy to use. Very special arrangements and machines are not required.

4.     Easily usable and reusable as they are flat, two-dimensional materials.

Graphic Aids - I

This section includes those graphic aids which have similar principles of preparation, presentation and storage, and can be employed to do serious classroom teaching in home science.

DIAGRAMS

A diagram is a visual symbol, made with the help of lines and geometrical forms without pictorial elements to explain mostly a process or parts of something. Diagrams can be of many varieties.

The area and shape of objects are shown with an outline, and may be filled with colours.

Inner parts and their arrangement are shown by cutting an object longitudinally.

It gives a scaled presentation of the design of a plan such as a floor plan.

Parts of a machine are shown; directions also may be given.

Scientific experiments are explained through this type of diagram.