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Maximizing the use of the overhead projector and the chalkboard
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Maximizing the use of the overhead projector and the chalkboard


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  • 1. Maximizing the Use of the Overhead Projector and the Chalkboard Educational Technology 1
  • 2. Objective: 1. To be able to know the techniques which can help maximize the use of the overhead projector and the chalkboard.
  • 3. Chalkboard or blackboard  a smooth hard pannel, usually green or black, for writing on with chalk .( Overhead Projector An overhead projector is a variant of slide projector that is used to display images to an audience. (
  • 4. The Chalkboard Except in extremely deprived classroom, every classroom has a chalkboard. In fact, a school may have no computer, radio, tv, etc, but it will always have a chalkboard. So why not make optimum use of what we have, the chalkboard? Sharpen your chalk to get good line quality.  Stand with your elbow high. Move along as you write.  Use dots as “aiming points.” This keeps writing level Make all writing or printing between 2 and 4 inches high for legibility.  When using colored chalk, use soft chalk so that it can be erased easily
  • 5. The Overhead Projector There are other kinds of projectors like opaque projector and slide projector. The overhead projector seems more available in schools. It has a lot of advantages. Brown (1969) cites the following: • The projector itself is simple to operate. • The overhead projector is used in the front of the room by the instructor, who has complete control of the sequence, timing, and manipulation of his material. • Facing his class and observing students reactions, the instructor can guide his audience, control its attention, and regulate the flow of information in the presentation.
  • 6. Overhead Projection Technique Among the outstanding attributes of overhead projection are the many techniques that can be used to present information and control the sequence of the presentation. As you plan your own transparencies, keep in mind these features of overhead projection: • You can show pictures and diagrams, using a pointer on the transparency to direct attention to a detail. The silhouette of you pointer will show in motion in the screen. • You can use a felt pen or wax-based pencil to add details or to make points in the transparency during projection. The marks of waterbased pens and pencils can be removed with a soft cloth so that the transparency can be reused. • You can control the rate of presenting information by covering a transparency with a sheet of paper or cardboard (opaque material) and then exposing data as you are ready to discuss each point. This is known as the progressive disclosure technique. • You can superimpose additional transparency sheets as a overlays on a base transparency so as to separate processes and complex ideas into elements and present them in step-by-step order.
  • 7. Other reminders on the effective use of the OHP are: • Stand off to one side of the OHP while you face the students. Don’t talk to the screen. • Face the students when you talk, not the screen. • Place the OHP to your right, if you are right handed, and to your left, if you are left handed. • Place the OHP on a table low enough so that it does not block you or the screen. • Have the top of the screen tilted forward towards the OHP to prevent the “keystone effect” (where the top of the screen is larger than the bottom).
  • 8. We can learn from the experiences of others. Brown (1969). Enumerates effective practices. Let’s learn from them. • In primary grades, simple object like keys, leaves, and cutout paper shapes can be placed directly on the projector to stimulate children’s imagination and encourage discussion. • In English composition lessons, student themes or writing exercises can be reproduced in film by means of the heat or photo copy process. The teacher and students can analyze the writing for style and grammar as each example is projected. • In arithmetic, blank sheets of acetate and grease pencils can be given to selected students. Have them prepare solutions to homework problems so the class may evaluate and discuss their results.
  • 9. The overlaying technique to do progressive disclosure is illustrated below: • After making a sketch of the content for the transparency, decide which parts will be the base and which will be used for each overlay. • Prepare a master drawing for each separate part. • In two corners on each master, make register marks that match marks previously put on the sketch. This will ensure proper registration of each overlay. • Prepare the transparency from each master.
  • 10. Submitted by: Jeovener Valsote BEED II – A Submitted to: Prof. Mary Gene Panes