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Teaching Math...
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 carnality 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." Represent
the set "C" as a subset of set "M"
and answer the following question:
What is the carnality 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

Teaching Math in 2010:
El hachero vende un camion carga por
$100. La cuesta de production es.............???