With all the hoopla lately over the new common core math... I had to share: The following examples may help to clarify the difference between the new and old math. 1960: A logger sells a truckload of lumber for $100. His cost of production is 4/5 of this price. What is his profit? 1970 (Traditional math): A logger sells a truckload of lumber for $100. His cost of production is $80. What is his profit? 1975 (New Math): A logger exchanges a set L of lumber for a set M of money. The cardinality of set M is 100 and each element is worth $1. (a) make 100 dots representing the elements of the set M (b) The set C representing costs of production contains 20 fewer points than set M. Represent the set C as a subset of the set M. (c) What is the cardinality of the set P of profits? 1990 (Dumbed-down math): A logger sells a truckload of lumber for $100. His cost of production is $80 and his profit is $20. Underline the number 20. 1997 (Whole Math): By cutting down a forest full of beautiful trees, a logger makes $20. (a) What do you think of this way of making money? (b) How did the forest birds and squirrels feel? (c) Draw a picture of the forest as youd like it to look.
Posted on: Sun, 06 Apr 2014 16:46:45 +0000
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