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The Concept Map you are trying to access has information related to:
charles hoban, Science of Ed. emphasizing precision based methods, concrete must precede the abstract in breadth, depth, & variety towards progressive stages of abstraction, Graphics (more realistic, the more concrete) and Motion Pictures (very concrete), Visualizing the curriculum (1937) Why Visual Aids in Teaching? Point of this article in book, Visualizing the curriculum (1937) tech orientantion grouded Educational Engineering, Educational Engineering emphasizing standardization, Point of this article in book to eliminate verbalism in the schools, Motion Pictures (very concrete) and Museums, use of words w/o appreciation of context in which words to be used solution concrete must precede the abstract in breadth, depth, & variety, Science of Ed. emphasizing measurement