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The Classic Math Pro
In 1960 "A logger sells a truckload of lumber for $100. His cost of production is 4/5 of this price. What is his profit?" In 1970 (traditional math): "A logger sells a truckload of lumber for $100. His cost of production is 4/5 of this price; in other words $80. What is his profit? In 1970 (new math): "A logger exchanged a set L of lumber for a set M of money. The cardinality of set M is 100, and each element is worth $1. Make one hundred dots representing the elements of the set M. The set C of the costs of production contains 20 fewer points than set M. Represent the set C as a subset of M, and answer the following question: 'What is the cardinality of the set P of profits?'" In 1980: "A logger sells a truckload of wood for $100. His cost of production is $80, and his profit is $20. Your assignment: underline the number 20." In 1990 (outcome based education): "By cutting down beautiful forest trees, a logger makes $20. What do you think of this way of making a living? (Topic for class participation: How did the forest birds and squirrels feel?)" - Extracted from "21st Century Science and Technology," Winter, 1993-4, p.12 
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