OVER HEAD PROJECTOR( by AAKASH SINGH)

OVER HEAD PROJECTOR:

The overhead projector is the most used in all a.v. aids. It projects transparencies with brilliant screen images suitable for use in a lighted room. The teacher can write or draw diagrams on the transparency while he teaches; these are projected simultaneously on the screen by the OHP.

During presentation:

•         Keep the screen above the heads of the participants.
•          Keep the screen in full view of participants
•          Make sure you are not blocking any ones view when presenting.
•          Darken the room appropriately by blocking out sunshine and dimming near by.
•          Turn the screen off between slides if you are going to talk for more than two.
•          Talk to the audience, not to the screen

Purposes:

•          To develop concepts and sequences in a subject matter area.
•          To make marginal notes on the transparencies for the use of the teacher that can carry with out exposing them to the class.
•          To test students performances, while other classmates observe.
•          To show relationships by means of transparent overlays in contrasting color.
•          To give the illusion of motion in the transparency.

Advantages:

•          It permits the teacher to stand in front of the  class while using the projector, thus enabling her to point out features appearing on the  screen by pointing to the materials at the  projector it self  and at the same  time, to observe the students reactions to her discussion.
•          Gains attention of the student