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Math 1950-2005:
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 1950
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 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?
3. Teaching Math In 1970
A logger sells a truckload of lumber for $100. His
cost of production is $80. Did he make a profit?
4. 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.
5. 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.)
6. Teaching Math In 2005
Un hachero vende una carretada de maderapara $100. El
costo de la producciones es $80.