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Teaching math Teaching Math in the 1950s: A logger sells a truckload of lumber for $100. His cost of production is 4/5 of the price. What is his profit?Teaching Math in the 1960s: A logger sells a truckload of lumber for $100. His cost of production is 4/5 of the price, or $80. What is his profit?Teaching Math in the 1970s: A logger sells a truckload of lumber for $100. His cost of production is $80. Did he make a profit?Teaching Math in the1980s: A logger sells a truckload of lumber for $100. His cost of production is $80 and his profit is $20. Your assignment is to underline the number 20.Teaching Math in the 1990s: A logger cuts down a beautiful forest because he is selfish and inconsiderate and cares nothing for the habitat of animals or the preservation of our woodlands. He does this so he can make a profit of $20. What do you think of this way of making a living? (Topic for class participation after answering the question: How did the birds and squirrels feel as the logger cut down their homes? (There are no wrong answers, and if you feel like crying, it's OK.)Teaching Math in 2009: Un hachero vende una carretada de madera para $100. El costo de la produccion es $80. Cuanto dinero ha hecho?Teaching Math in 2013: Who cares, just steal the humber from your rich neighbor's property. He won't have a gun to stop you, and the President says it's OK anyway cuz it's redistributing the wealth.