A

#### Anonymous

##### Guest

>>> >

>>> > The counter girl took my $4.00 and I pulled 8 cents

>>> > from my pocket and gave it to her. She stood there,

>>> > holding the nickel and 3 pennies. While looking at the

>>> > screen on her register, I sensed her discomfort and

>>> > tried to tell her to just give me two quarters, but

>>> > she hailed the manager for help. While he tried to

>>> > explain the transaction to her, she stood there and

>>> > cried.

>>> >

>>> > Why do I tell you this?

>>> >

>>> > Because of the evolution in teaching math since the

>>> > 1950s:

>>> >

>>> > Teaching Math In 1950

>>> >

>>> > 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 1960

>>> >

>>> > 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 1970

>>> >

>>> > A logger sells a truckload of lumber for $100. His

>>> > cost of production is $80. Did he make a profit?

>>> >

>>> > Teaching Math In 1980

>>> >

>>> > 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.

>>> >

>>> > Teaching Math In 1990

>>> >

>>> > 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.)

>>> >

>>> > Teaching Math In 2005

>>> >

>>> > Un ranchero vende una carretera de madera para $100.

>>> > El cuesto de la produccion era $80. Cuantos tortillas

>>> > se puede comprar?

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