Teaching Math

Changes in Teaching philosophy over the years.

Teaching math in the 1950’s:
A logger sells a truckload of lumber for $100.00. His cost of
production is 4/5 of the price.  What is his profit?

Teaching math in the 1960’s:
A logger sells a truckload of lumber for $100.00.  His cost of
production is 4/5 of the price, or $80.00.  What is his profit?

Teaching math in the 1970’s:
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 the set “M”.
Represent the set “C” as a subset of set “M” and answer the following
question: What is the cardinality of the set “P” of profits?

Teaching math in the 1980’s:
A logger sells a truckload of lumber for $100.00.  His cost of
production is $80.00 and his profit is $20.00.  Your assignment:
underline the number 20.

Teaching math in the 1990’s:
By cutting down beautiful forest trees, a logger makes $20.00.
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 $100.00.  His cost of
production is $120.00.  How does  Arthur Anderson  (Enron Corp.
auditing firm) profit margin is $ 60.00?

Teaching math in 2010:
El hachero vende un camion carga por $100.00. El costo de production
es…..

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