The Overhead Projector (Ohp)

The operating cost Projector (OHP) August 24, 2012 Introduction Overhead Projectors argon still being utilize in a lot of schools, like in the Philippines. It is non as modern as other equipments, but it still serves its conclude which is to show en stupendousd images on separate. I. translation The Overhead Projector is an optical device for masking images on screen, usually for group viewing. The OHP is in the first place used for projecting charts, sketches, and other temporal prepargond on sheets of transp atomic number 18nt plastic. II. Techniques You sack show pictures and diagrams, using a cursor on the transparency to direct assistance to a detail. The silhouette of your pointer put up show in motion on the screen. You gage use a felt up paper or wax-based pencil to attention deficit hyperactivity disorder details or to make points on the transparency during projection. You clear promise the browse of presenting information by covering a transparency with a sheet of paper or cardboard ( obscure textile) and then exposing selective information as you are ready to converse individually point. This is known as the continuous tense Disclosure Technique. You can superimpose supernumerary transparency sheets as overlays on a base transparency so as to separate processes and complex ideas into elements and present them in step-by-step order. You can show three-dimensional targets from the stage of the projector-in silhouette if the object is opaque or in color if an object is made of transparent color plastic. You can move overlays back and forth crosswise the base in order to rearrange elements of diagrams or problems. For special purpose, you can dissemble motion on parts of a transparency by using the effectuate of polarized light. You can simultaneously project on an adjacent screen other ocular materials, usually slides or motion pictures, which exemplify or apply the generalization shown on a transparency. Other reminder s on the rough-and-ready use of the OHP are Stand off-key to one side of the OHP while you look the scholarly persons. wearyt talk on 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 leftfield if you are left handed. Place the OHP on a postpone low enough so that it does not block you or the screen. Have the buy the farm of the screen tilted forward towards the OHP to disallow the keystone effect (where the top of the screen is self-aggrandizingr than the bottom). Avoid the mistake of including withal a good deal detail on each image. A simple layout makes an effective slide. If an earshot needs to be given details, provide handouts to be studied later. Avoid Brobdingnagian tables of figures. Come up with graphic presentations. Dont read the text on your slide. Your audience can read. Avoid in addition much text. Rely sparingly on printed text. Come up with more graphs, diagrams, or p ictures. Your presentation must be percipient from afar. Simple use of color can add effective emphasis. III. Advantages The projector itself is simple to operate. The OHP is used in the front of the room by the teacher who has complete control of the sequence, timing, and consumption of this material. Facing his class and observing student reactions, the instructor can guide his audience, control its attention, and regulate the flow of information in the presentation. The projected image behind the instructor can be as large as necessary for all in the audience to see it is clear and bright, even so in fairly well-lighted rooms. Since the transparency, as it is placed on the projector, is seen by the instructor exactly as students see it on the screen, he may point, write, or other make indications upon it to facilitate communication. The stage (projection mount) of the projector is large (10 by 10 inches), thus allowing the teacher to write information with ease or to s how prepared transparencies. It is especially simple for teachers and students to create their own materials for use in the OHP. An increasing number of high-quality commercial transparencies. Brown, 1969) IV. Limitations It requires a constant power supply and a white flat surface on which its image can be projected. If the surface is not suitably inclined at the correct angle, the image will stay from a phenomenon called keystone effect. Handwritten material can look sloppy if not pre-prepared. Presenter and audience can be distracted by the lights glare. Lamps can combustion out and interrupt a presentation. thick The Overhead Projector is indeed a real versatile equipment. With prepared materials, we can do so much in a short time.We can save much time when we present our lectures on transparencies sooner of writing notes or drawings naively on the chalkboard. Also, by culture how to use it properly, we are able to realize our instructional objectives, and adopting them in teaching ensures a lasting learning for our students. Sources Educational Technology 1 by Brenda B. Corpuz Paz I. Lucido http//www. safetyxchange. org/training-and-leadership/part-3-overhead-projectors http//www. buzzle. com/articles/what-is-an-overhead-projector. html New Standard cyclopaedia (Volume 13) pp. 592-593