"A History of Math Education" joke

Saw this one on a professor's door:
The evolution of mathematics education
during the last 30 years.
1960's
A peasant sells a bag of potatoes for $10. His costs amount to 4/5 of his
selling price. What is his profit?
1970's
A farmer sells a bag of potatoes for $10. His costs amount to 4/5 of his
selling price, i.e. $8. What is his profit?
1970's (New Math)
A farmer exchanges a set P of potatoes with a set M of money. The cardinality
of the set M is equal to $10 and each element of M is worth $1. Draw 10 big
dots representing the elements of M.
The set C of production costs is comprised of 2 big dots less than the set M.
Represent C as a subset of M and give the answer to the question: What is the
cardinality of the set of profits? (Draw everything in red).
1980's
A farmer sells a bag of potatoes for $10. His production costs are $8 and his
profit is $2. Underline the word "potatoes" and discuss with your classmates.
1990's
A kapitalist pigg undjustlee akires $2 on a sak of patatos. Analiz this tekst
and sertch for erors in speling, contens, grandmar and ponctuassion, and
than ekspress your vioos regardeng this metid of geting ritch.
Author unknown

You go to a party and you see a SEXY girl across the room. You go up to her and say "Hi, I'm great in bed, what about it?".
That's direct marketing.
You go to a party and you see a SEXY girl across the room. You give your friend a tenner. She goes up and says more...

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Three couples were married and stayed at the same hotel for their honeymoons, where they were all taken care of by Dave the Bellboy. The first man married a nurse. Dave showed them to their room and thought to himself, "What a lucky guy. Nurses are known to be hot to more...

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Mrs. Cohen, the buxom, sexy housewife was built so well the TV repairman couldn't keep his eyes off of her. Every time she came in the room, he'd near about jerk his neck right out of joint looking at her.
When he'd finished she paid him and said, "I'm going to make more...

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A guy is going on a tour of a factory that produces various latex products. At the first stop, he is shown the machine that manufactures baby-bottle nipples. The machine makes a loud' hiss-pop' noise.' The hiss is the rubber being injected into the mold,' explains the guide.' more...

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A guy driving a Yugo pulls up at a stoplight next to a Rolls-Royce. The driver of the Yugo rolls down his window and shouts to the driver of the Rolls, "Hey, buddy, that's a nice car. You got a phone in your Rolls? I've got one in my Yugo!"
The driver of Rolls more...

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