The Overhead Projector (Ohp)

The smash Projector (OHP) August 24, 2012 Introduction Overhead Projectors ar still being use of goods and servicesd in a lot of schools, manage in the Philippines. It is not as modern as other equipments, solely it still serves its purpose which is to gift en elephantined images on screen. I. Description The Overhead Projector is an optical device for showing images on screen, usually for group viewing. The OHP is generally utilise for projecting charts, sketches, and other material prepared on sheets of vaporous plastic. II. Techniques You move show pictures and diagrams, using a pointer on the hydrofoil to direct attention to a detail. The silhouette of your pointer will show in exercise on the screen. You can use a mat paper or wax-based pencil to add details or to flummox points on the enhancer during projection. You can match the rate of presenting information by covering a transparency with a sheet of paper or cardboard ( semiopaque material) and then exposing data as you are ready to demonstrate each point. This is kn knowledge as the Progressive Disclosure Technique. You can position additional transparency sheets as overlays on a base transparency so as to separate processes and complex ideas into elements and present them in gradually order. You can show three-dimensional objects from the stage of the projector-in silhouette if the object is opaque or in tinge if an object is made of transparent color plastic. You can move overlays back and forth across the base in order to rearrange elements of diagrams or problems. For special purpose, you can simulate motion on parts of a transparency by using the set up of polarized light. You can simultaneously project on an adjacent screen other visual materials, usually slides or motion pictures, which illustrate or habituate the generalization shown on a transparency. Other reminders on the effective use of the OHP are Stand off to one side of the OHP while you establishment the st udents. gullt talk on the screen. Face the students when you talk, not the screen. name 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 closedown you or the screen. Have the top of the screen tilted forward towards the OHP to go on the pillar effect (where the top of the screen is king-sizedr than the bottom). nullify the defect of including too oft detail on each image. A simpleton layout makes an effective slide. If an audience needs to be given details, provide handouts to be studied later. Avoid large tables of figures. Come up with graphic presentations. Dont read the text on your slide. Your audience can read. Avoid too much text. Rely sparingly on printed text. Come up with more graphs, diagrams, or pictures. Your presentation must be readable from afar. bare(a) use of color can add effective emphasis. III. Advantages The projector itself is simple to operate. T he OHP is used in the front of the room by the instructor who has complete control of the sequence, timing, and manipulation 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 intercommunicate image behind the instructor can be as large as necessary for all in the audience to see it is dupe and bright, even 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 otherwise make indications upon it to facilitate communication. The stage (projection surface) of the projector is large (10 by 10 inches), thus allowing the teacher to write information with backup or to show prepared transparencies. It is especially easy 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 uninterrupted 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 suffer from a phenomenon called keystone effect. Handwritten material can look sloppy if not pre-prepared. supporter and audience can be distracted by the lights glare. Lamps can sting out and interrupt a presentation. Summary The Overhead Projector is indeed a very versatile equipment. With prepared materials, we can do so much in a short season.We can save much time when we present our lectures on transparencies instead of writing notes or drawings naively on the chalkboard. Also, by learning 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 engine room 1 by Brenda B. Corpuz Paz I. Lucido http//www. safety xchange. org/training-and-leadership/part-3-overhead-projectors http//www. buzzle. com/articles/what-is-an-overhead-projector. html New Standard Encyclopedia (Volume 13) pp. 592-593