#### S&P

##### Well-known member

- Joined
- Apr 1, 2005

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Last week I purchased a burger at Burger King for $1.58. The counter

girl took my $2 and I was digging for my change when 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:

1. Teaching Math In 1950s

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

is 4/5 of the price. What is his profit ?

2. Teaching Math In 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?

3. Teaching Math In 1970s

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

is $80. Did he make a profit?

4. Teaching Math In 1980s

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.

5. Teaching Math In 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.)

6. Teaching Math In 2008

Un hachero vende una carretada de maderapara $100. El costo de la

producciones es $80. Cuanto dinero ha hecho?