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Paper was first produced in china and used for writing by 3AD.
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The problem of availability of manually copied manuscripts had improved after 1450 when the Gutenberg printing press was invented.
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In the 1600s, public education emerged with horn-books as the media that transmitted knowledge in a written form to the students.
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In the 1800s magic lantern was introduced to schools. Magic lantern was a device which projected printed images of glass frames onto the walls in darkened classrooms.
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Modern blackboard dates back to the 1801, which was at the time considered quite a revolution. James Pillans, a geography teacher in Edinburgh, Scotland, hung a large piece of slate on the classroom wall.
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In 1900 pencils and papers replaced school slates and chalks.
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In the 1910s radio emerged, allowing students to learn from radio programs.
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In the 1920s the film projector was invented.
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In the 1940s, the first ballpoint pen was introduced in schools. It is also at this time that mimeographs helped teachers to retype their materials and spread homework assignments to the entire class (the only disadvantage at the point was that teachers' fingers were painted dark blue because of the ink).
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First headphones and TVs arrived to schools in the 1950s - it is also at that time that the lessons could be learned through repetition.
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Overhead projectors first appeared in schools in the late 1950s allowing teachers to print their materials on plastic sheets and also write directly to the plastic sheets with a non-permanent washable marking pen.
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In the 1960s, with the emergence of the information age, VHS, VCR and audio tapes could be used to enrich lessons. Math must have been a pretty exhausting subject at schools.
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Only in 1972 had the first handheld calculator arrived to schools, allowing pupils to type in the operands and perform mathematical operations in a single click. It was at the time quote a debate whether the calculators should be allowed in schools. Teachers were initially afraid that calculators would undermine time-tested skills of counting on fingers!
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First IBM PCs arrived in 1981 to the classrooms, however, their use was limited to word processing. Also, there was no World Wide Web at the time.
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In the 1990 and the appearance of the World Wide Web, pupils could send e-mails, and research the Internet.