>  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 a subset of set "M" and answer the
>  following question:  What is the cardinality of the set "P" for
> profits?
> 
>  Teaching Math in 1980: A logger sells a truckload of lumber for $100.
>  Her cost of production is $80 and her 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 1996: By laying off 40% of its loggers, a company
>  improves its stock price from $80 to $100.  How much capital gain per
>  share does the CEO make by exercising his stock options at $80? Assume
>  capital gains are no longer taxed, because this encourages investment.
> 
>  Teaching Math in 1997: A company out-sources all of its loggers.  The
>  firm saves on benefits, and when demand for its product is down, the
>  logging work force can easily be cut back.  The average logger employed
> 
>  by the company earned $50,000, had three weeks vacation, a nice
>  retirement plan and medical insurance.  The contracted logger charges
>  $50 an hour.  Was outsourcing a good move?
> 
>  Teaching Math in 1998: A laid-off logger with four kids at home and a
>  ridiculous alimony from his first failed marriage comes into the
>  logging-company corporate offices and goes postal, mowing down 16
>  executives and a couple of secretaries, and gets lucky when he nails a
>  politician on the premises collecting his kickback. Was outsourcing the
> 
>  loggers a good move for the company?
> 
>  Teaching Math in 1999: A laid-off logger serving time in Folsom for
>  blowing away several people is being trained as a COBOL programmer in
>  order to work on Y2K projects. What is the probability that the
>  automatic cell doors will open on their own as of 00:00, 01/01/00?