Thinkfinity: Message List
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Most recent forum messagesenMon, 01 Apr 2013 05:00:46 GMTJive Engage 5.0.5.0 (http://jivesoftware.com/products/)2013-04-01T05:00:46ZenA Great Math Problem — Or Is It?
http://www.thinkfinity.org/message/67666?tstart=0#67666
<!-- [DocumentBodyStart:bcee3cef-645e-411a-9a18-fa863affe94a] --><div class="jive-rendered-content"><p>Just before winter break, Illuminations sent a holiday treat (in the form of a math problem) to the subscribers of <a class="jive-link-external-small" href="http://illuminations.nctm.org/NewsletterSubscriptionForm.html">the <em>Bright Ideas</em> newsletter</a>. The recipients included elementary, middle, and high school math teachers. The problem is implicitly personalized — students have to find the value of the letters in their name, based on some criteria given in the problem. A PDF of the problem is attached, or you can view it here:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="text-align: center;"><strong><a class="jive-link-external-small" href="http://tinyurl.com/nameletters">http://tinyurl.com/nameletters</a></strong></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>A number of recipients shared their thoughts on this problem with <a class="jive-link-email-small" href="mailto:illuminations@nctm.org">illuminations@nctm.org</a>.</p><ul><li>“I gave the brainteaser to my students, and it was a success," wrote a high school teacher from Illinois. "The students were communicating about mathematics and having a great time. The problem was hard, but the difficulty is what encouraged them to seek help from others. This activity did a masterful job of utilizing several of the Common Core mathematical practices. Thank you for sharing this activity!”</li><li>A middle school teacher told us, "I would like to use this holiday math problem with my students, but I can't give them a problem that seems to be impossible to solve, even for a school full of teachers. How do we make this problem more fun for the kids, but allowing them some success?"</li><li>Another teacher asked, "What age child would you expect to be able to solve this puzzle, and how long would you expect it to take?"</li></ul><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong>What's your opinion?</strong><em> Is this a good problem? Would you use it with your students? Would you modify it in any way?</em></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>FYI, no answer key is provided with the problem. However, any person can check their answer at <strong><a class="jive-link-external-small" href="http://tinyurl.com/nameletterscheck">http://tinyurl.com/nameletterscheck</a></strong>.</p></div><!-- [DocumentBodyEnd:bcee3cef-645e-411a-9a18-fa863affe94a] -->Tue, 08 Jan 2013 18:56:49 GMTnoreplies@thinkfinity.orghttp://www.thinkfinity.org/message/67666?tstart=0#676662013-01-08T18:56:49Z1 year, 3 weeks ago50Re: Interactive Whiteboards and Thinkfinity
http://www.thinkfinity.org/message/2905?tstart=0#2905
<!-- [DocumentBodyStart:77bbbdba-cb3d-4e54-b128-d85d4b114130] --><div class="jive-rendered-content"><p>Thanks for the plug, Marc! The <a class="jive-link-external-small" href="http://illuminations.nctm.org/ActivityDetail.aspx?id=205">Dynamic Paper</a> applet was launched last October, and its already climbed the ranks to become <a class="jive-link-external-small" href="http://illuminations.nctm.org/">Illuminations</a>' sixth most popular applet. It's been visited 132,285 times since it was released!</p></div><!-- [DocumentBodyEnd:77bbbdba-cb3d-4e54-b128-d85d4b114130] -->Thu, 03 Jun 2010 13:05:47 GMTnoreplies@thinkfinity.orghttp://www.thinkfinity.org/message/2905?tstart=0#29052010-06-03T13:05:47Z1 year, 1 month ago0Re: How can we help parents with new math strategies?
http://www.thinkfinity.org/message/67570?tstart=0#67570
<!-- [DocumentBodyStart:4faebc37-890f-4912-8b8e-8625bd3c5f6b] --><div class="jive-rendered-content"><p>NCTM has developed a library of high school tasks that align to the Common Core and focus on developing reasoning and sense-making:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><a class="jive-link-external-small" href="http://www.nctm.org/rsmtasks">http://www.nctm.org/rsmtasks</a></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The library currently contains 10 tasks, but more are being developed, and submissions are encouraged! If you have a great task to share, please fill out <strong><a class="jive-link-external-small" href="http://www.nctm.org/standards/forms.aspx?ekfrm=33070">the online form</a></strong>.</p></div><!-- [DocumentBodyEnd:4faebc37-890f-4912-8b8e-8625bd3c5f6b] -->Mon, 07 Jan 2013 11:37:52 GMTnoreplies@thinkfinity.orghttp://www.thinkfinity.org/message/67570?tstart=0#675702013-01-07T11:37:52Z1 year, 1 month ago0Re: Fractions!
http://www.thinkfinity.org/message/68189?tstart=0#68189
<!-- [DocumentBodyStart:86745036-0bbf-4f6c-a9c3-f6074375a1db] --><div class="jive-rendered-content"><p>Kerina --</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span>My favorite math manipulative for fractions is </span><a class="jive-link-external-small" href="http://illuminations.nctm.org/equivfrac">http://illuminations.nctm.org/equivfrac</a><span>. (That URL will take you to a version for desktops, laptops, and mobile devices, depending on what you're using.)</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I also like <a class="jive-link-external-small" href="http://illuminations.nctm.org/ActivityDetail.aspx?ID=11">Illuminations: Fraction Models,</a> but you'll have to decide if this is appropriate for your students. It might be at a slightly high level for 3rd-grade students who are just learning fractions.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I also think <a class="jive-link-external-small" href="http://illuminations.nctm.org/LessonDetail.aspx?id=U152">Illuminations: Fun with Fractions</a> would be a good lesson for you to use, especially for 3.NF.A.1.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>And <a class="jive-link-external-small" href="http://illuminations.nctm.org/LessonDetail.aspx?ID=L784">Illuminations: Fractional Clothesline</a> is a fun classroom activity that helps kids understand fractions on a number line.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I hope those help! Fractions are tough, and I don't envy you having to get kids to understand them in just a week... good luck!</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Patrick Vennebush</p><p>Online Projects Manager, NCTM</p></div><!-- [DocumentBodyEnd:86745036-0bbf-4f6c-a9c3-f6074375a1db] -->Wed, 23 Jan 2013 18:55:55 GMTnoreplies@thinkfinity.orghttp://www.thinkfinity.org/message/68189?tstart=0#681892013-01-23T18:55:55Z1 year, 3 months ago0Re: Online skill evaluation
http://www.thinkfinity.org/message/67587?tstart=0#67587
<!-- [DocumentBodyStart:bb061d1c-5095-4bac-8384-0b6036d90e16] --><div class="jive-rendered-content"><p>Denise -- I'm hesitant to suggest an online site that's free, as the quality varies highly. Does your school allow you access to student standarized test scores from previous years? That might be a good place to start -- those scores are usually broken down by topic, which might be particularly helpful when creating cooperative groups for different activities.</p></div><!-- [DocumentBodyEnd:bb061d1c-5095-4bac-8384-0b6036d90e16] -->Mon, 07 Jan 2013 11:51:04 GMTnoreplies@thinkfinity.orghttp://www.thinkfinity.org/message/67587?tstart=0#675872013-01-07T11:51:04Z1 year, 3 months ago0Re: What is a more creative/interesting way to intorduce tax to 7th graders?
http://www.thinkfinity.org/message/67586?tstart=0#67586
<!-- [DocumentBodyStart:bba52b15-7c90-4d53-a954-aa32ef1aa412] --><div class="jive-rendered-content"><p>I love Jeffrey's idea! I saw a lesson once where the teacher had her kids do something similar, and it was very effective. It also had kids work with pounds vs. dollars, so there was some implicit conversion practice. Some of the less mathy kids really got into the historical part of it.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The lesson <strong><a class="jive-link-external-small" href="http://illuminations.nctm.org/LessonDetail.aspx?id=L805">Invest in Your Education</a></strong> from Illuminations uses sales tax (and other fees and discounts) to teach about percents. The woman who wrote this lesson for us based it on what she did in the classroom -- kids would arrive one day, and all furniture and class supplies (books, pencils, calculators) would be piled in the back of the room. Kids had to purchase the supplies they needed using fake money and calculating the cost of the items. They could use coupons to reduce the cost; and any money they had left over they could use to buy fun things, such as erasers, candy, etc. -- so there was built-in incentive to do a good job.</p></div><!-- [DocumentBodyEnd:bba52b15-7c90-4d53-a954-aa32ef1aa412] -->Mon, 07 Jan 2013 11:48:41 GMTnoreplies@thinkfinity.orghttp://www.thinkfinity.org/message/67586?tstart=0#675862013-01-07T11:48:41Z1 year, 3 months ago0Re: Never Ever Divide By Zero
http://www.thinkfinity.org/message/67569?tstart=0#67569
<!-- [DocumentBodyStart:a54c06ef-47c8-42be-a062-647b1aa09ad0] --><div class="jive-rendered-content"><p>That's awesome, Jeffrey! Thanks for sharing it with the group.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Creating math song parodies seems to be quite popular these days. This one caught social media fire last year<a class="jive-link-external-small" href="http://www.youtube.com/watch?v=z6hCu0EPs-o">: Quadratic Formula - based on Adele's <em>Rolling in the Deep</em></a></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Anyone else have a fun math video to share?</p><p><a class="jive-link-external-small" href="http://www.youtube.com/watch?v=z6hCu0EPs-o">http://www.youtube.com/watch?v=z6hCu0EPs-o</a> </p></div><!-- [DocumentBodyEnd:a54c06ef-47c8-42be-a062-647b1aa09ad0] -->Mon, 07 Jan 2013 11:31:53 GMTnoreplies@thinkfinity.orghttp://www.thinkfinity.org/message/67569?tstart=0#675692013-01-07T11:31:53Z1 year, 3 months ago30School Fundraiser that Uses Math
http://www.thinkfinity.org/message/65191?tstart=0#65191
<!-- [DocumentBodyStart:4882e787-4616-4e44-96ff-c2cf65ad0f14] --><div class="jive-rendered-content"><p>Just saw an inspired idea at Natural Blogarithms, a blog by Dr. Scott Franklin. He mentioned that his kids' school is having a unique fundraiser. He said:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="padding-left: 30px;">"Instead of accumulating donations to win for their own grade, they are putting their change in other grades' canisters. The grade with the lowest <em><strong>weight</strong></em> in donated change at the end of the fund-raising wins."</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I love this idea. Kids have to think about math as they try to help their class win. Which coins are the best -- that is, which ones have the highest weight to value ratio? You can read Dr. Franklin's analysis here:</p><p><a class="jive-link-external-small" href="http://blog.drscottfranklin.net/2011/10/05/penny-is-for-penalize/">http://blog.drscottfranklin.net/2011/10/05/penny-is-for-penalize/</a></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>What interesting school spirit activities has your school used that incorporate math?</p></div><!-- [DocumentBodyEnd:4882e787-4616-4e44-96ff-c2cf65ad0f14] -->Mon, 19 Nov 2012 13:09:04 GMTnoreplies@thinkfinity.orghttp://www.thinkfinity.org/message/65191?tstart=0#651912012-11-19T13:09:04Z1 year, 5 months ago0Thanksgiving Math Lessons
http://www.thinkfinity.org/message/65041?tstart=0#65041
<!-- [DocumentBodyStart:447978a5-364c-47b5-937e-ccaeb4675559] --><div class="jive-rendered-content"><p>For kindergarten, my son has to come up with a "Friday Fun Fact" every week. The teacher gives a topic. This week, it was Thanksgiving. He decided he'd like to share how many turkeys are eaten on Thanksgiving day. Before researching the answer, he and his twin brother estimated. First guess was a billion. Then we discussed that Thanksgiving is a national holiday, and there are only 300 million people in the U.S. And then he realized that sometimes one turkey is used at a gathering of many people, so it'd be much less than 300 million. He finally guessed 8 million. His twin brother guessed 4 million. I split the difference and guessed 6.7 million.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>We all woefully underestimated. According to <a class="jive-link-external-small" href="http://www.infoplease.com/spot/tgturkeyfacts.html">Turkey Facts (infoplease.com)</a>, approximately <strong>45 million turkeys</strong> are consumed on Thanksgiving day! Holy smokes! That accounts for one-sixth of all turkeys consumed in the U.S. annually.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Are there any fun activities you'll be doing in your class for Turkey Day? Or with a short week before the holiday, some teachers use this as a chance to explore a math topic that isn't normally part of the curriculum. What will you be doing with your students the two or three days prior to Thanksgiving?</p></div><!-- [DocumentBodyEnd:447978a5-364c-47b5-937e-ccaeb4675559] -->Thu, 15 Nov 2012 15:51:47 GMTnoreplies@thinkfinity.orghttp://www.thinkfinity.org/message/65041?tstart=0#650412012-11-15T15:51:47Z1 year, 5 months ago0Re: Teen Tech Week: How do you use technology in class?
http://www.thinkfinity.org/message/64965?tstart=0#64965
<!-- [DocumentBodyStart:391bbd02-b7b1-49d0-a99f-f3a98c007737] --><div class="jive-rendered-content"><p>www.polleverywhere.com - works just like clickers, but with cell phones</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>The free version has a 30-response limit, but that should be plenty for most classrooms.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Here's an activity I do with it: Set up a poll where people enter the first digit of their street address. Most folks are very surprised to see that 1 is the most common first digit.</p></div><!-- [DocumentBodyEnd:391bbd02-b7b1-49d0-a99f-f3a98c007737] -->Wed, 14 Nov 2012 12:55:15 GMTnoreplies@thinkfinity.orghttp://www.thinkfinity.org/message/64965?tstart=0#649652012-11-14T12:55:15Z1 year, 5 months ago0