In the 1950s, legendary behaviorist B.F. Skinner debuted his version of a “teaching machine,” based on the 1924 invention of Ohio State University psychology professor Sidney Pressey. The contraption was loaded with a piece of paper with questions, and students pressed keys indicating the correct answer, at which point another question would appear. Both Pressey and Skinner ran into similar problems, though, failing to implement the technology in schools. Educators weren’t convinced of the machine’s benefit, which prioritized individually paced learning not conducive to students of the same age moving through a grade level at the same time.
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第二十七条 增值税法第二十四条第一款第二项所称医疗机构，是指依据有关规定设立的具有医疗机构执业资格的机构，包括军队、武警部队各级各类医疗机构，不包括营利性美容医疗机构。