Overhead projector transparency sheets10/31/2023 The paper copies also help protect your transparencies from static cling. When you want to check what you’re about to project, or refer back to a previous transparency, you can look at your paper printouts instead of fumbling through a stack of plastic sheets in a darkened room. If you store your overheads in a box, you can interleave the paper copies with the transparencies. To give yourself a convenient reference to what you’re projecting, print your entire set of overheads once on transparency film and again on plain bond paper. Bring spare grease pencils so you don’t have to stop if your point wears down, as well as a paper towel to use as an eraser. If you bring extra blanks with you, you can accommodate long sets of suggestions without resorting to too-small handwriting to write down all the input. Adding blank sheets of film to your stack of printouts enables you to ask questions and record the replies. Blanks and Writing Toolsīecause overhead transparencies accept hand-written annotations in grease pencil, you can plan ahead for those portions of your talk in which you ask your audience for comments. Avoid simply summarizing your talk in a series of unedited bullet-point pages that add nothing to your message. Just as you’d set up PowerPoint slides following the 7×7 rule no more than seven lines of type, each with no more than seven words add type sparingly to each page you prepare for overhead projection. Page CoverageĮspecially if you plan to attach your transparencies to cardboard frames for easier handling, leave generous margins around your content to enhance its effectiveness when you project it. Although you won’t want to crowd each sheet of film with more content than you can project legibly, you also don’t want to work on a document that doesn’t match your output dimensions. Regardless of whether you’re targeting a networked colour copier, laser or inkjet printer, the transparency film you buy comes in one size: 8.5 inches by 11 inches. When you design a presentation for an overhead projector, you’ll want to set up your working document to match the size of the medium on which you’ll print it out. Following the class period, the transparencies are easily restored to their original unused state by washing off with soap and water. When the transparency sheet is full of written or drawn material, it can simply be replaced with a new, fresh sheet with more pre-printed material, again saving class time vs a blackboard that would need to be erased and teaching materials rewritten by the educator. The enlarging features of the projector allow the educator to write in a comfortable small script in a natural writing position rather than writing in an overly large script on a blackboard and having to constantly hold their arm out in midair to write on the blackboard. The overhead is typically placed at a comfortable writing height for the educator and allows the educator to face the class, facilitating better communication between the students and teacher. This saves time, since the transparency can be pre-printed and used repetitively, rather than having materials written manually before each class. Teaching materials can be pre-printed on plastic sheets, upon which the educator can directly write using a non-permanent, washable color marking pen. The overhead projector facilitates an easy low-cost interactive environment for educators. Overhead projectors were widely used in education and business before the advent of computer-based projection. They were widely used in education and business before the advent of video projectors. These are placed on the glass platen of the projector, which has a light source below it and a projecting mirror and lens assembly above it (hence, ‘overhead’). In the overhead projector, the source of the image is a page-sized sheet of transparent plastic film (also known as ‘foils’) with the image to be projected either printed or hand-written/drawn.
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