Comments on: WCYDWT: The Slow Runner

By: shaun

shaun — Mon, 11 Feb 2013 18:07:34 +0000

thanks for the quick reply. I am going to try an adapted version of the lesson and mention the 2/3

My students will follow up with a project, titled “Me and Julio”. We will set them up in the gym and sprint so that they can compare their times to Julio Jones. I’ll send samples or post (if I ever get a chance)

By: Dan Meyer

Dan Meyer — Mon, 11 Feb 2013 17:45:35 +0000

Hm. At first my thought was that acceleration accounts for the missing time. But those differences should be uniform if the entire video is slowed down.

If it were me, I’d just tell your students that the announcer was wrong. That it’s 2/3 the speed.

By: shaun

shaun — Sat, 09 Feb 2013 23:41:20 +0000

I am adapting this lesson for Monday and struggling with the concept of “half speed” as mentioned in the video. If Julio Jones travels 40 yards in 4.39 seconds, my feeling is that half speed would mean it takes him twice as long to travel the distance (8.78 seconds). But the video works out to be about 6.585 seconds or 1.5 times his original speed. Shouldn’t we say then that Jones is running at 2/3 of his original speed? What am I missing here?

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By: Dan Meyer

Dan Meyer — Thu, 05 Aug 2010 01:21:59 +0000

My two cents.

Speed and unit conversion is nice. Converting to miles per hour is a useful way to talk about speed. (Here’s hoping you measured the distance between fence poles.)

Looking over your other hooks, I’m inclined to ask this: what is the predominant question when anyone watches a race?

The perplexing question is “who is going to win?”

Depending on what information you provide or obscure, you can then push the conversation towards different skills, but the most engaging way to start this problem is with that question. Other questions might lead to a better standard or skill but you’re working against what is naturally perplexing about your video.

I find this kind of curriculum design very tricky and I’m grateful for the chance to bounce some ideas around.

By: Scott Haluck

Scott Haluck — Wed, 04 Aug 2010 23:49:13 +0000

@Dan, thanks. Just trying to explore the media. As for questions, trying to decide what’s best…
-speed and unit conversion as mentioned above
-if everyone started at the same time, how far apart were they when they started? (X-intercepts)
-what time will each person be passed by the fastest racer? (Solving systems)
-How long is the race? -if the race lasted for 400 meters, how far apart would everyone be?

Appreciate any input from the community… Thanks.