The evolution in teaching math since the 1950s :
1. 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?
2. 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?
3. Teaching Math In 1970 :
A logger sells a truckload of lumber for $100. His cost of production is $80. Did he make a profit?
4. Teaching Math In 1980 :
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 1990 :
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 yo u 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 answer s. )
6. Teaching Math In 2007 :
Un hachero vende una carretada de maderapara $100. El costo de la producciones es $80. Cuanto dinero ha hecho?
