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Message: New Math - What did I do wrong?
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 (when I was in school)
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 2010
Un hachero vende una carretada de madera para $100. El costo de la
producciones es $80. Cuanto dinero ha hecho?
ANSWER: His profit was $375,000 because his logging business is just a
front for his marijuana farm.
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