Last week I purchased a burger at a fast food restaurant for $1.58. The counter girl took
my $ 2 and I was digging for my change when 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 screen on
her register.
I sensed her discomfort and tried to tell her to just give me two quarters, but she
hailed the manager for help. While he tried to explain the
transaction to her, she stood there and cried.
Why do I tell you this? 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 truckload of lumber for $100. His cost of production is 4/5 of the
price, or $80. What is his profit?
3. Teaching Math In1970s
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 2009
Un hachero vende una carretada de maderapara $100. El costo de la producciones es $80.
Cuanto dinero ha hecho?
7. Teaching Math In 2013
Who cares, just steal the lumber from your rich neighbor’s property. He won’t have a gun
to stop you, and it’s OK anyway cuz it’s redistributing
the wealth.
Lol.