Factors influencing selection of Audio Visual aids

FACTORS INFLUENCING SELECTION OF AV AIDS

  • AV aids are used singly or in combination, taking into consideration the following factors.
    • The teaching objective
    • The nature of subject matter
    • The size of audience
    • Relative cost of the various aids
    • The nature of the audience
    • The teachers skill and familiarity with aids
    • The availability of the aids

Audio visual aids

  • Models, Mock-ups, Specimens, Objects
    • Model: is essentially an imitation or replica of original, whether workable or not, and whether differing or not from original size.
    • Mock-up: differs from the model in that it is a functional device, which alters the essential elements.
      • E.g. operating mock-up of feed mixing plant.
    • Specimens: real objects taken out of their natural settings.
    • Objects: Pieces of reality or sample.
  • Dramatized experience
    • It is participating in a reconstructed experience. Here the knowledge, education and understandings were conveyed through songs and ballads, dramas and dances, puppet shows and festivals.
  • Exhibits
    • A planned display of models, specimens, charts, posters etc presented to the public.
  • Motion pictures
    • These are really a series of still pictures on a long strip of film. Each picture is flapped and rapid succession of still pictures gives an illusion of movements.
  • Recordings
    • Sound can be recorded in 3 ways: Disc, tape and wire. Tape recorder is an audio equipment for recording sounds on magnetic tape by electro-magnetic process.
  • Still pictures
    • Non-projected
      • Photographs are exact visual recordings of things.
      • Illustrations are non-photographic reconstructions of reality.
        • E.g. drawings, paintings, etc.
    • Projected
      • Slides: It is a transparent picture (on glass or film) which is projected by focusing light through it from bulb.
      • Film strips: is a series of still photographs, diagrams, drawings or lettering on a strip of 35 mm films.
  • Other visual aids
    • Chalk board: It is most universally used of all the teaching aids. It is not itself a visual material but a vehicle for a variety of visual materials.
    • Bulletin board: It is a simple inexpensive device that can be placed either out-doors or in-doors. A soft board that will hold pins or tacks is most suitable for displaying photographs, drawings, notices, posters etc.
    • Flannel graph: It is a visual teaching aid. Pieces of flannel felt or sandpaper, having rough surfaces or nap will stick to another piece of flannel stretched on a firm flat surface called a flannel board. When you attach piece of sand paper to the back of pictures or photographs, letters etc. to be stuck on the flannel board it is called flannel graph.
    • Flash cards: Are series of illustrated cards which when flashed or presented in proper sequence tells a complete story.
    • Posters: Is an important visual aid. But like other aids the poster is never used alone. It must be always a part of a campaign or teaching programme.
    • Charts: Are visual symbols for summarizing, comparing, contrasting or performing other services in explaining subject matter. In other words, they are used more conveniently for diagrammatic presentation of facts and ideas.
      • Pull charts
      • Striptease charts
      • Flow or organization charts
      • Bar charts
      • Time (or Table) charts
      • Job charts
      • Tree charts or stream charts
      • Flap charts
      • Overlay charts
      • Pie charts (Pie graphs)
      • Line charts (Line graphs)
      • Pictorial graphs
    • Dust and mud sketching: In sand, dust, soil and mud in which highly elective, inexpensive and readily available visual materials can be drawn using a pointed stick, a sharp stone or one’s own finger. It is possible to illustrate many different ideas such as layouts for villages, poultry sheds and equipment sheds.

Last modified: Friday, 4 May 2012, 5:15 AM