#### Executive

**NES Member**

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 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 the1950s:

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 and his profit is

$20 Your assignment: Underline the number 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 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.)

Teaching Math In 2006

Un ranchero vende una carretera de maderapor

$100. El cargo de produccion es $80. Cuantas

tortillas se puede comprar.

Chris