Month: May 2008

Total 18 Posts

Jason Dyer Isn’t Human

Pity the poor bloggers who don’t have Jason Dyer running wild in their comments. He’s holding court right now in my last post, running something like a mathematical Total Request Live.

People drop by and say, “Hey, does anyone have an engaging, concise problem to motivate (eg.) matrix row reduction?” and Jason pops back with an awesome seven-word problem involving $5,000,000 in a stolen leather satchel which covers the entire standard.

You’re like, “Cool, but can I see that in a tenth grade,” and the dude obliges.

Credit, also, to Steve Peters, my UCD roommate, now at MIT for a doctorate in robot clouds or something, for putting his big brain to use around here.

What I’m saying is that perhaps I have underestimated these internets of yours, thank you.

Between Simple And Easy

My favorite problems are simple but not easy. The difference hasn’t always been apparent. I’m talking about clear, minimal constraints which require complicated, comprehensive thought. These problems are rare, but some lucky days they arise from a single image, like the one up there, like the one today.

The Question

If that table tennis ball is the Earth:

  1. how big is the Sun?
  2. how far away is the Sun?

Follow Through

You take bets. Is the sun a tennis ball? A beach ball? (A: something closer to a weather balloon.) If you miniaturized the solar system, what solar body would focus the Earth’s orbit? (A: the taqueria down the road.) You pick their pockets with these bets, getting them to buy into the problem unwittingly.

Maybe you put them into groups and wait until they requisition data. (eg. the radius of the Earth, the tennis ball, and the Sun; the mean distance from the Earth to the Sun.) Maybe you give them all laptops and let them scour the ‘tubes for the same data.

And I Wonder Constantly:

  1. do these simple-but-not-easy questions exist for every math standard on the books?
  2. who has them?
  3. are these people easily extorted?

The Most Dangerous Game

a/k/a Well How Do You Spend May?

A freshman collapsed motionless outside my door. Then he got up, laughed, and flashed a signal at a friend who groaned and fell down likewise. They both ran to class.

Gawah?

My freshmen came into first period flashing the same signals and I asked them, “Gawah?” They told me this:

Instructions

  1. You flash the birdman at anyone sworn into the game. If the flashee makes unblocked eye contact with the flasher, he has to [insert penalty here, which penalty, for my boys, was falling down].
  2. You can make eye contact with the flasher so long as you throw up a block first.

I couldn’t help it. I asked them to swear me in.

Tactics, Takeaways, and Assorted Combat Notes

  • As a general rule, if someone calls out “Hey, Meyer!” from across the classroom/lawn/courtyard/whatever, it’s best to throw up a block before you look.
  • If you want someone to look at you from across the classroom/lawn/courtyard/whatever, don’t holler out the person’s name. Holler out, “POPSICLES!” or something equally nonsensical insteadLike “FIRE!” Wait. Not that..
  • These kids are smart. They cameraphoned themselves flashing the birdman and then sent media messages to their targets. Digital natives!
  • I flashed the birdman into PhotoBooth and loaded the picture into our math slides. Later I pressed a button on my remote and flashed ’em all at once!Okay, yeah, I know this is pedagogically terrible. This won’t become a habit, I promise.
  • Word got out to the freshman class that I was sworn in. This created a tricky imbalance since a lot more of them know of me than I know of them. This imbalance became most evident as I planned lessons that afternoon in a coffee shop seven miles away where a kid I’d never seen before walked by my window seat, stared at me oddly, and then flashed the birdman!I blocked.

The Tally

Yeah, I guess I did okay.