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Evolution of Math

1950 - Old Math
A logger sells a truckload of lumber for $100. His
cost of production is four-fifths of this price.
What is his profit?
1960 - Traditional Math
A logger sells a truckload of lumber for $100. His
cost of production is four-fifths of this price, in
other words $80. What is his profit?
1970 - New Math
A logger exchanges set L of lumber for set M of money.
The cardinality of set M is 100, and each element is worth
$1. Make one hundred dots representing the elements of
set M. The set C is the subset of M. What is the cardinality
of the set P of profits?
1980 - High Self-Esteem Math
A logger sells a truckload of wood for $100. His cost of
production is $80, and his profit is $20.
Your assignment: Underline the number 20.
1995 - Outcome Based Education
By cutting down beautiful trees, a logger person makes $20.
What do you think of this way of making a living? In your
group, discuss how the forest birds and squirrels feel and
write an essay about it.