>
> Last week I purchased a burger and fries at McDonalds for $3.58.
>
> 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?
>
> Question: How did the birds and squirrels feel as the logger cut down
> their
> homes? (There are no wrong answers.)
>
> Teaching Math In 2006�¿
>
> 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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