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Chalk Leaves PowerPoint in the DustAugust, 2002 MARKETERS PRAISE the latest information technologies as learning tools, but after 27 years of teaching, Professor Edward Lazear believes "the blackboard is far more effective than overhead transparencies or slick PowerPoint presentations." "Writing on the blackboard is a signal to students that a point is particularly relevant, and it constrains the instructor to present the material at a rate closer to that at which students can absorb material," he writes in the introduction to a Hoover Institution book on education reform that he edited. "An overhead or slide presentation often offers too much information in one short interval and, by overwhelming the students, ends up putting them to sleep." As for formal research on classroom aids, Lazear writes, "Although it is difficult to argue that additional resources do not have some value, the evidence on technology has been weak at best and more often negative." His book, Education in the 21st Century, includes a critique of many popular educational reform ideas. |
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