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.