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Pingala invented the binary number system.
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The first known calculator was invented in Babylonia.
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Johann Gutenberg invented teh alphabetic movable type printing press.
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Wooden paddles with printed lessons were used in the colonial era.
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William Oughtred and others credited with inventing the slide rule.
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Pellegrino Turri and Ralph Wedgewood invented a primitive form of handmade carbon copy paper for the blind.
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By Louis Braille.
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An English eductor, taught shorthand by mail.
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By Charles Thurber.
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Richard M. Hoe is the inventor.
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A pointer and punishment tool.
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In a darkened room this device was used to project images prnted on a glass plate to students.
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Established a society that presented educational opportunities to women of all classes to study at home.
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By Thomas Alva Edison.
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By Thomas Edison.
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Started homestudy courses in mine safety.
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Located in the state of New York, this college gave degrees to students who completed the coursework through correspondence and by attending summer workshops.
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Ballpoint pen was invented.
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School slate was first used in nearly all classrooms.
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The chalkboard is considered on of the biggest inventions in educational technology.
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By Nikola Tesla.
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Pencils eventually replaced the school slate.
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Marketed by the Keystone View Company, stereoscopes were basicially three-dimensional viewing tools, used to illustrate points made during lectures.
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by Auguste and Louis Lumiere.
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by Lee DeForest.
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By Philo Farnsworth.
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First used by New York City's Board of Education to send lessons to schools via the radio, known as "schools of the air".
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Similar to the motion-picture projector, the film projector was used in classrooms to project images.
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First used by the U.S. military for training purposes in World War II.
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Became a useful tool in the classroom.
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The mimeograph made hand-cranked copies.
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The slide rule was used as a calcultion tool.
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Listening stations were installed in schools using headsets and audio tapes to allow the students to head repeated drills to increase their learning ability.
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Presented to the public.
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An adjustable metal bar that helped students tamp down a page, designed to help students read more efficiently.
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A device developed by B.F. Skinner that allowed a student to proceed at his or her own pace through a regimented program of instuction.
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Educational programming was aired across the country.
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Introduced by Xeros and gradually replaced copies made by carbon paper and mimeograph machines.
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By David Paul Gregg.
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By Douglas Engelbart.
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A simple tool that allowed individual students to watch filmstrips at their own pace.
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By Andries van Dam and Ted Nelson.
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By Ray Tomlinson.
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By James Fergason.
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by David Noble with IBM.
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This tool removed the need for grading multiple-choice exams.
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Plato was one of the most-used early computers in the education market.
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A single CD could store an entire encyclopedia plus video and audio.
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Made more advanced math much easier.
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by Tim Berners-Lee.
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Was one of the first tools to allow teachers to be able to quickly poll students and get results in real time.
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Was durable and cheap enought to sell or donate to developing countries, it works well in sunlight, is waterproof.
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It's early predecesor is considered to be the school slate.
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Created by a secretary in her kitchen.