WELCOME

PROJECTED AIDS

Submitted by,

DEEPTHI SIVAN

1st BEd MATHEMATICS

SREE NARAYANA COLLEGE OF EDUCATION

MUVATTUPUZHA

• A projected aid is one in which items to be observed are projected on a screen using a mechanical device . Film projected on a wide screen using a film projector is a typical example. These aids are found to be very effective because movement can be added to sound and hence a realistic experience be provided.

CLASSIFICATION OF PROJECTED AIDS

FILMS AND FILM PROJECTORFILM STRIPS AND FILMSTRIP PROJECTORSLIDES AND SLIDE PROJECTOREPISCOPE AND EPIDIA SCOPETELEVISIONLCD PROJECTORDLP PROJECTOR

A single picture itself is an effective aid ,but a sequence of picture presented continuously has a cumulative effect.That is why a film in the form of a motion picture is considered to be a valuable aid. With the help of a film projector a motion picture depicting a continuous process can be projected on a screen fixed at a convenient place so that every student can clearly observe the presentation and at the same time attend to the related sounds. Synchronising the moving figures with sound makes the experience realistic and lively.

FILMS AND FILM PROJECTOR

FILMSTRIPS AND FILMSTRIP PROJECTOR

A filmstrip is a piece of non- inflammable safety film, 35mm wide .Its length may vary according to requirement and can be up to about one meter. One such strip may contain 10 to 50 picture frames. These pictures may constitute a connected series of drawings , photographs, diagrams or a combination of these and illustrate a single sequence , theme or incident. The filmstrips are projected by a filmstrip projector.

SLIDE AND SLIDE

PROJECTOR Any picture or diagram which will take a long

time to be drawn on black board in the course of a class period can be developed as a slide. This slide can be got

enlarged by projecting it on a screen with a slide projector.

Slide projector is an instrument equipped with a powerful light source and a carrier for

holding slides of suitable size. Usually a double slide carrier is filled into the projector so that when one slide in being

projected on the screen a second slide can be kept ready for projection. The projector can also be operated and focussed by remote controls. This aid is not only time saving but also helpful to add to the impression of the learning experience.

EPISCOPE AND EPIDIA SCOPE

Episcope is used for projection of opaque objects. The principle of reflected projection is used in this. Pictures, photographs, drawings or any opaque material within the size of the platform of the episcope can be projected using this instrument. During epi-projection the room should be totally darkened in order to get a clear bright image. It is not advisable to resort to epi-projection for normal class room teaching. Episcope can be used to enlarge book diagrams and to illustrate complex materials.

TELEVISION Television also can be considered as a projected aid. But projection is made at a central place, the T.V.station. It is a very exciting and efficient means of mass communication. Educational television programmes aim at education rather than entertainment. These programmes can compensate for the scarcity of qualified teachers and lack of well equipped laboratories. A teacher or specialist can render teaching sessions and pass information to millions of viewers all over the world. Since the programmes are announced in advance, the institution can prepare the pupils to closely attend the telecast. Television can provide a variety of interesting learning experiences.

LCD PROJECTOR LCD (Liquid Crystal Display) Projector is the most advanced and sophisticated projecting aid. It is used to present a topic in the classroom or in front of a large audience . We can demonstrate the real world situation and simulations in the classroom in a theatre-like atmosphere . In the area of Educational Technology , we can replace all other projected and non projected aids with only a single LCD projector and a computer system.

DLP PROJECTOR

DLP (Digital Light Processing) technology is developed by Texas instruments. It has completely different structure compared to LCD. The DLP chip is a reflective surface

made up of 1000’s (or millions) of microscopic mirrors.