Showing posts with label What Can You Do With This?. Show all posts
Showing posts with label What Can You Do With This?. Show all posts

Saturday, May 18, 2013

Practicing my speech. "When will I ever use this?"

Originally posted on 3 April 2010, but I wanted to say it again.


"When are We EVER going to have to use this?"

"Beats me," I usually answer. "You can't even tell me definitively what you'll be doing next month, forget about four years from now. How can I definitively say when or whether you'll use THIS?

All I can say is that it is useful in certain situations (the word problems in this section are limited versions of the same problems some people face daily), useful as mathematical development for later work (which may be a prerequisite for the course or job you really wanted) or as mental development to expand your brain beyond the limited understanding and very limited world-view you currently have. I'm not being critical here - you really have no experience at life. How could you possibly know the utility of everything you're learning?"

You have millions of possibilities ahead of you, thousands of doors along this hallway you call life.

Writing ability will unlock many of them, artistic ability others, mathematical ability many more. Some may require that you speak English well - certainly 95% of the jobs in this country do. Some will require a little of everything.

Each of these doors is along a different stretch of hallway. Each educational decision you make takes you down one branch or another, closing off some possibilities and making others available. To switch from one branch of the tree to another may require a little backtracking to pick up things that you could be learning now.

I have no idea which doors will interest you so I have to lay a very broad groundwork and push you in directions you may not immediately see any need for. You have to trust that, over the course of many years and many students, I have a good sense of what you might need and of what you may find interesting after we're done.

How do I know this? I talk to my students after they graduate. They tell me what they found useful or pointless. I get all kinds of stories about topics that we covered here that directly applied to something they were working on, stories about being the only one who really understood something the professor was trying to say. There aren't many complaints that we spent too much time on a topic they never saw again.

If there is ever a commonality in the comments of returning graduates, it's this: 'I never imagined that THAT would be useful. I was surprised when it showed up. So was the professor - he was grateful SOMEONE knew about it.'

As Seth Godin mentioned the other day, the odds of becoming anything in particular are pretty slim. The odds of being able to land that gig at the radio station are pretty small, considering that the current jobbers probably want to keep their jobs. The odds of being a pro basketball player are less than 1:1,000,000; of becoming a developer for the software firm down the street or the next Andy Warhol, virtually nil."
The ardent or insane pursuit of a particular goal is a good idea if the steps you take along the way also prep you for other outcomes, each almost as good (or better). - Seth Godin
You can't pick a single destination because that destination might not be there when you arrive. Choose instead an education that can branch unexpectedly to fit the sudden turns you'll face.

What courses should you take? Everything you can. This is the last time education is free. Take drafting, poetry, physics, sculpture, statistics, history, psychology, another language. If you can take it, you should take it. If you find out you hate it, then no harm done.

Did you know that the Spanish teacher can also teach Russian? No, I don't honestly know how you, personally, will use Russian, my little snowflake.

I don't know how you'll use a knowledge of parabolas or an understanding of rates of change, either. I know how I use them and how my friends use them, but I can't speak for you. I can watch anime in the original Japanese and catch a smattering of the dialog. Is that reason enough to take Japanese? It wasn't the reason at the time I took Japanese but it is neat now. My Japanese students still laugh at my speaking ability (or lack thereof).

I won't bother to tell you that I used parabolas to design an archway in the garden because you don't care. I won't tell you how a recent graduate earned $30 an hour in her first collegiate summer helping her professor build a radically new type of solar panel - because you'll just say that you're not going to study that. Neither does she, but her knowledge of calculus, biology and chemistry is why she got the job. I won't tell you how an actuary uses probability and statistics and calculus to predict random events.

Here's a fundamental truth: If you don't learn it now, you will never be able to use it and that will be a huge disappointment for you.

Let's try a thought experiment to see another reason why I reject your casual dismissal of this course. Try these statements on for size:

(A) You're black and I won't let blacks take the difficult math classes because it's too hard for them; their brains aren't developed enough.
(B) You're a girl and everyone knows that girls can't do math. You should change to elementary education.

Angry yet?

It's wrong, isn't it?

If I were to say that I was not going to allow you to take this math class because you are Hispanic, or Black, or female, you would be all over my case for discrimination. You are capable enough and you should be allowed to take whatever you want ... so why do you willingly do to yourself what only a blatantly racist and sexist asshole would do to you?

To sum up: I don't know when, or even if, you'll ever use this. Please don't let your current malaise lead you to ignore this work and prevent you from doing something you are fascinated by in the future.

Remember that hallway? Don't slam those doors in your face before you even get there to see through the peephole.

See you in math next year, kiddo - maybe even AP Calculus.

Sunday, July 3, 2011

#anyqs Fireworks

It's a goldmine:

But the embedded NatGeo clip doesn't show up in Google Reader. Click through.
size of shell vs height
time differential between first and second explosion
COLORS !
Bunch of things.

Friday, April 22, 2011

That's WYCDWT - Speeding Tickets

"For each ticket, Mr. Foreman digitally superimposed the two photos - taken 0.363 seconds apart from a stationary point, according to an Optotraffic time stamp - creating a single photo with two images of the vehicle. Using the vehicle’s length as a frame of reference, Mr. Foreman then measured its distance traveled in the elapsed time, allowing him to calculate the vehicle’s speed. In every case, he said, the vehicle was not traveling fast enough to get a ticket."

Judges agreed.  Booyah.

Monday, April 11, 2011

Thursday, October 28, 2010

PsuedoContext



Dan Meyer gives an example from "The Real World":
Santa Cruz Sentinel, today:
The City Council will consider a proposal today to establish a citywide pay-by-cell phone system that would allow motorists to start, finish and extend time for meters or fee-based parking spots. [..] Consumers would pay a fee of 35 cents per transaction, or 25 cents for frequent users if they are willing also to pay a monthly access fee of $1.75.

"Is pseudocontext a failure of imagination or is it a symptom of laziness? Because this sort of thing just isn't hard to find."
I think it's pretty lame of him to toss out this false dichotomy like that. (My browser settings and his comment system don't seem to be on speaking terms, so I'll mention this here.)  And I notice that he's been teaching for how long and only now noticed this gem? (I know that's unfair, but so is the original question.  I withdraw my snarky comment.)

No, the real problem here is one of timing, of not having this pop up in your newspaper on the day you need it, at the time you're doing the lesson planning. It's got little to do with a lack of imagination.  In fact, a lack of imagination is probably the best trait for someone doing lesson plans.  Teaching takes imagination -- why waste this limited resource on something as foolish as lesson plans?  What God in whichever Heaven you stare at when you can't see a ceiling decreed that you must know what the kids will be doing during the 13th minute of your class period? What if you needed to repeat something or -- swoon -- got off on a really good tangent?

Besides, not everyone spends every waking moment solely focused on teaching and mathematics. Sometimes, I just read.

It does take a certain frame of mind to watch for these things ... an old teacher friend of mine used to clip articles ... this is similar.  I never could get the hang of it with newspaper, but I do find it easier on the Internet. Now that I have been using the thumbdrive method of file transport, I have amassed a large library of these types of things, neatly sorted into the classes and folders so I can find them later when I get around to it. (Yeah, right)

Having said that, this "Real-World" problem is no more or less engaging to students than the cellphone plan that charges by the month or by the 100 minute-block or the psuedocontextual dreck in the book.

[So I had a five-minute bit of Photoshop fun at Dan's expense. Don't think nothing of it.]

Wednesday, June 2, 2010

Letter to the Editor - WCYDWT?

Found this. What Can You do with It?
It costs more to use less
An Albany (NY) Times Union Letter to the Editor

It's bad enough that the town of Colonie, in tandem with the Latham Water District, has raised the cost per 1,000 gallons of water usage a number of times over the past few years. Now, the minimum charge has been raised so that anyone trying to conserve water will pay more than the base rate.

In the last six months, my water usage decreased by 5,000 gallons, but instead of paying for the water at the rate of $2.65 per 1,000 gallons, I've been assessed a minimum charge of $3.25 per 1,000 gallons because I failed to use as much water as the town thought I should use. Unless your usage is more than 20,000 gallons in a six-month period, you will be zapped with a higher rate.

Why would I want to be careful about water usage when it will cost me more if I use less?

This administration apparently is taking a page out of the book of the state Legislature by trying to make up its deficit on the backs of the people it will hurt the most, the seniors. I believe the seniors are most likely the group who will use the least amount of water, yet pay more for it. Water conservation helps everyone and it should not be used as a tool for the town of Colonie to make money.

Robert Leffingwell
Colonie

Saturday, May 1, 2010

What can you do with this? Fish Fungus

Last year, one of the fish developed a fungal infection:
We don't care much about this particular one as it was a 12 cent feeder fish but the same pond has other fish.  The koi, for example, are quite valuable. If we did nothing, this one might infect the rest.  So we needed PIMAFIX, but how much?
More below.

WCYDWT? Really. I don't know yet.

Honest. I just found it and it struck me. What can you do with this?
MWRA is activating its emergency water supplies such as the Sudbury Aqueduct, Chestnut Hill Reservoir and Spot Pond Reservoir. THIS WATER WILL NOT BE SUITABLE FOR DRINKING, but can be used for bathing, flushing and fire protection.

The leak is located at the location where the MetroWest Water Supply Tunnel meets the City Tunnel on Recreation Road. This 120-inch diameter pipe transports water to our communities east of Weston – as far north as Wilmington and south to Stoughton. Water is leaking into the Charles River at rate of over 8 million gallons an hour.
http://www.mwra.com/updates/leak.html

Sunday, March 7, 2010

Olympic Rates

What Can You Do With This?
A couple of things struck me ...
  1. Is the video still at vancouver2010.com when I want to use this again? - nope.  Yes!
  2. How fast are they going?
  3. If two racers were both on the same course at the same time, how much distance would separate two racers at the finish ? (already in the table)
  4. What is the angle of the slope?
  5. Results are here - how long they'll stay?
What else?













With thanks to Dan Meyer for the Theme.