Teaching Math In 1950’s:

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’s:

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’s:

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

Teaching Math In 1980’s:

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.

Teaching Math In 1990’s:

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. )

Teaching Math Today:

Un ha chero vende una carretada de maderapara $100. El costo de la Producciones es $80. Cuanto dinero ha hecho?