I purchased a normal Whataburger at Whataburger for $2.08. The counter girl took my $5 bill 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 three ones, 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 1970s:
1) Teaching Math in the 1970s
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 the 1980s
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 the 1990s
A logger sells a truckload of lumber for $100. His cost of production is $80. Did he make a profit ? Yes or No
4)Teaching Math in the 2000s
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 the 2010s
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 the 2020s
The evil white male cisgendered logger went into the forest to kill beautiful trees, please explain why you think he is transphobic and bigoted. Bonus: Explain why he and his family should be cancelled.