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Evolution of Teaching Math
Last week I purchased a burger and fries at McDonald's for $3.58.
The counter girl took my $4.00 and I pulled 8 cents from my pocket and
gave it to her.She stood there, holding the nickel and 3 pennies, while looking at the screenon her register. I sensed her discomfort and tried to tell her to just give metwo quarters, but she hailed the manager for help. While the manager explainedthe transaction to her, she stood there and cried.Why do I tell you this? Because of the evolution in teaching math since the 1950s:
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 sells a truckload of lumber for $100. His cost of production is $80. Did he make a profit?
Teaching Math In 1980:
A logger sells a truckload of lumber for $100. His cost of production is $80 andhis profit is $20. Your assignment: Circle $20.
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 sohe 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.)
Teaching Math In 2005:
Un ranchero vende una carretera de madera para $100. El cuesto de la produccionera $80. Cuantos tortillas se puede comprar?