The evolution in teaching math since the 1950s......
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>> Teaching Math In the 1950s
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>> A logger sells a truckload of lumber for $100. His cost of production is
>> 4/5 of the price. What is his profit?
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>> Teaching Math In the 1960s
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>> 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?
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>> Teaching Math In the 1970s
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>> A logger sells a truckload of lumber for $100. His cost of production is
>> $80. Did he make a profit?
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>> Teaching Math In the 1980s
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>> A logger sells a truckload of lumber for $100. His cost of production is
>> $80 and his profit is $20 Your assignment: Underline the number 20.
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>> Teaching Math In the 1990s
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>> 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.)
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>> Teaching Math In the 2000s
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>> Un ranchero vende una carretera de madera para $100. El cuesto de la
>> produccion era $80. Cuantos tortillas se puede comprar?