Comments on: What Can You Do With This: Annuli /2010/what-can-you-do-with-this-annuli/ less helpful Wed, 26 Jun 2013 01:09:14 +0000 hourly 1 https://wordpress.org/?v=6.8.2 By: Ticket Roll Reworked | Zero-Knowledge Proofs /2010/what-can-you-do-with-this-annuli/#comment-953159 Wed, 26 Jun 2013 01:09:14 +0000 /?p=7119#comment-953159 […] first time Dan Meyer came to Edmonton, he had us work on this problem. It was engaging, and a room full of teachers dug right in. The second time he came to Edmonton, he […]

]]> By: Teaching for Perplexity | The 2013 Sudbury Sessions /2010/what-can-you-do-with-this-annuli/#comment-899107 Sun, 19 May 2013 17:52:21 +0000 /?p=7119#comment-899107 […] LinkThe Ticket Roll […]

]]> By: The 2013 Reading Sessions | Perplexity Keynote /2010/what-can-you-do-with-this-annuli/#comment-894124 Sat, 18 May 2013 16:38:49 +0000 /?p=7119#comment-894124 […] LinkThe Ticket Roll […]

]]> By: The 2013 21CLHK Sessions | Perplexity Keynote /2010/what-can-you-do-with-this-annuli/#comment-686243 Mon, 21 Jan 2013 03:01:48 +0000 /?p=7119#comment-686243 […] LinkThe Ticket Roll […]

]]> By: The 2012 Blue Ribbon Sessions | Perplexity /2010/what-can-you-do-with-this-annuli/#comment-600735 Wed, 05 Dec 2012 20:11:24 +0000 /?p=7119#comment-600735 […] LinkThe Ticket Roll […]

]]> By: The 2012 CMC Sessions | Modern Math Teaching /2010/what-can-you-do-with-this-annuli/#comment-593667 Fri, 30 Nov 2012 00:55:08 +0000 /?p=7119#comment-593667 […] LinkThe Ticket Roll […]

]]> By: The 2012 MISD Sessions | Modern Math Teaching /2010/what-can-you-do-with-this-annuli/#comment-564227 Tue, 06 Nov 2012 14:55:38 +0000 /?p=7119#comment-564227 […] LinkThe Ticket Roll […]

]]> By: The 2012 NCTM — Dallas Sessions | Modern Math Teaching /2010/what-can-you-do-with-this-annuli/#comment-533279 Mon, 08 Oct 2012 20:57:00 +0000 /?p=7119#comment-533279 […] LinkThe Ticket Roll […]

]]> By: Randy Blackwood /2010/what-can-you-do-with-this-annuli/#comment-492437 Sat, 18 Aug 2012 04:18:24 +0000 /?p=7119#comment-492437 Today was our first day of school, so as an intro activity in my PreAP Algebra 2 class, I took an old roll of tickets that was being thrown away last summer and as the students came in the door, I would greet them, write their seat number on the ticket and hand it to them. After the some typical 1st day logistics. I held up the roll of tickets I had and asked them what they would want to know about the roll. After some thought the typical question was “Hhow many tickets were on the row?” I wish I could have recorded the discussion in my 2nd hr. I had a student who proposed measuring the thickness of the ticket, count how many tickets were on the outer layer, measure the width of the roll to determine how many layers there were. After some discussion another student piped up, but the inner diameter doesn’t have as many tickets. So we decided to try the first method anyhow, as I said well at least we will know the maximum number of tickets there would be. I think our calculations were around 1300. Then another student proposed averaging the number on the inner layer with the outer layer for a better estimate. I believe the number was around 910. I used a set of micrometers to measure the thickness of the ticket, and a set of calipers to measure the length of the ticket, as well as diameters, etc.
It was amazing how accurate the correct calculation was. Prior to class the roll had 1000 tickets. When I did the measurements I calculated 999.5 After the second hour class I think the number of tickets left was around 940. I don’t remember the calculated number but is was within 8 of the actual number. And after my last class of students they calculated 914 tickets, when the actual number should have been about 910. Pretty awesome stuff.

]]> By: The 2012 MCTM Sessions | Keynote /2010/what-can-you-do-with-this-annuli/#comment-427080 Fri, 04 May 2012 02:25:02 +0000 /?p=7119#comment-427080 […] LinkThe Ticket Roll […]

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