So I'm flipping through the frames and I come to one where I was trying to explain how the slope of a vertical line is undefined, which I completely had forgotten about...

(Now with 100% less titlefail!)

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A collection of lessons that I like from my class, or that I've found through the magic of the internets.

## Thursday, October 22, 2009

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I cracked myself up today

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I was looking through my lesson on slope from last year, and there were a bunch of frames with this skateboarding guy to help show how to think about slope.

I laughed pretty hard. Chalk up a positive for having a terrible memory.

(Now with 100% less titlefail!)

So I'm flipping through the frames and I come to one where I was trying to explain how the slope of a vertical line is undefined, which I completely had forgotten about...

(Now with 100% less titlefail!)

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- Mr. Sweeney
- Philadelphia, PA
- I'm a high school math teacher who teaches at a private school in the suburbs of Philadelphia. This year I'll be teaching Algebra 1, Algebra 2 and Calculus.

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The poor guy's been hanging on there for a year now. How about throwing him a (horizontal) line?!

ReplyDeleteHe kind of reminds me of "Slope Dude". If you've never seen the Slope Dude video, let me explain: Slope Dude just loves to ski.

ReplyDeleteAs he makes his way uphill, he's puffing and panting, and it's a lot of hard work, so all the way uphill he keeps saying "Puff Puff Positive", until he finally reaches the top.

He starts sliding downhill, and he’s having a lot of fun. As he slides downhill, he says, "Niiiice Negative."

Then he comes to the boring part of the slope, which is just flat land. "This is zero fun," he says.

But Slope Dude isn't looking where he's going, so he falls off a cliff and yells out the worst swear word in the history of math: "UNDEFINED!!!"

This little guy is in a similar situation, except he’s skateboarding instead of skiing. :)