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." Represent the set

"C" as subset of set "M" and answer the following

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 2002:

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……..

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