Teaching Math
Last week I got a burger at Burger King for $1.58.
The counter girl took my $2 and 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 back two quarters, but she hailed
the manager for help and while he tried to
explain the transaction to her, she stood there
and cried.
Why do I tell you this? Read on...

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
exchanges a set "L" of lumber for a
set "M" of money.
The cardinality of set "M" is 100. Each
element is worth one dollar. Make 100
dots representing the elements of the
set "M." The set "C", the cost of
production, contains 20 fewer points
than set
"M."Represents the set "C" as a subset
of set "M". Answer this question: What
is the cardinality of the set "P" of profits?

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: By cutting down
beautiful forest trees, the logger makes $20.
What do you think of this way of making a
living? Topic for class participation after
answering the question: How did the forest
birds and squirrels feel as the logger cut
down the trees? There are no wrong answers.

Teaching Math in 2000: A logger sells a
truckload of lumber for $100. His cost of
production is $120. How does Arthur Andersen
determine that his profit margin is $60 ?
[ Author Unknown  from 'LABLaughs' (LABLaughs@LABLaughs.com) ]
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