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Math ... **

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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**

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to her. She stood there, holding
the nickel and 3 ****pennies.
While looking at the**

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screen on her register, I sensed her discomfort and tried
to tell her to just give**

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me two quarters, but she hailed
the manager for help. While he tried to explain**

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the transaction to her, she stood
there and cried. **

Why do
I tell you this?

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Because of the evolution in teaching math
****since
the 1950s: **

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Teaching Math In 1950: ****A
logger sells a truckload of lumber for ****$100.
His cost**

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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**

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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**

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

Teaching
Math In 1980: A logger sells a truckload of lumber
for **$100.
His cost**

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of production is $80 and his
profit is $20 Your assignment:**

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Underline the number
20. **

Teaching
Math In 1990: A logger cuts down a beautiful forest
because he is

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selfish and inconsiderate and cares nothing for the habitat
of animals or the**

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preservation of our woodlands.
****He
does this so he can make a profit of $20. **

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What ****do
you think****
****of
this way of making a living? Topic for class ****participation**

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after****
answering the question: How did the birds and squirrels
feel as the**

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l****ogger
cut down their homes? (There are no wrong answers.) **

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