People's Army of Sonoma

Because of the evolution in teaching math since the 1950s:

1. Teaching Math In 1950s

A logger sells a truckload of lumber for $100. His cost of production
is 4/5 of the price. What is his profit?

2. Teaching Math In 1960s

A logger sells a truck load of lumber for $100. His cost of production
is 4/5 of the price, or $80. What is his profit?

3. Teaching Math In 1970s

A logger sells a truckload of lumber for $100. His cost of production
is $80. Did he make a profit?

4. Teaching Math In 1980s

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.

5. Teaching Math In 1990s

A logger cuts down a beautiful forest because he is selfish and
inconsiderate and cares nothing for the habitat of animals or the
preservation of our woodlands. He does this so he can make a profit of
$20. What do you think of this way of making a living? Topic for class
participation after answering the question: How did the birds and
squirrels feel as the logger cut down their homes? (There are no wrong
answers, and if you feel like crying, it's ok. )

6. Teaching Math In 2007

Un hac hero vende una carretada de maderapara $100. El costo de la
producciones es $80. Cuanto dinero ha hecho?