tag:blogger.com,1999:blog-5303307482158922565.comments2016-06-22T13:04:42.538-07:00Math Mama Writes...Sue VanHattumhttp://www.blogger.com/profile/10237941346154683902noreply@blogger.comBlogger2109125tag:blogger.com,1999:blog-5303307482158922565.post-77371039504181195672016-06-22T13:04:42.538-07:002016-06-22T13:04:42.538-07:00Thank you! That looks good! (I've read the fir...Thank you! That looks good! (I've read the first page or two so far...)Sue VanHattumhttp://www.blogger.com/profile/10237941346154683902noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-91720215413600619812016-06-22T11:41:48.148-07:002016-06-22T11:41:48.148-07:00Regarding Leibniz, see this article from the Notic...Regarding Leibniz, see this article from the Notices: http://www.ams.org/notices/201307/rnoti-p886.pdf where they contend Leibniz "got it" too. However, one should point out that apparently Newton didn't do a very good job of explaining any of this to his contemporaries, even if he "got it"!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-57467651678003275812016-05-19T10:32:42.381-07:002016-05-19T10:32:42.381-07:00(Calvin, please email me at suevanhattum on hotmai...(Calvin, please email me at suevanhattum on hotmail. I am doing fine.)Sue VanHattumhttp://www.blogger.com/profile/10237941346154683902noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-6084377508621851122016-05-18T22:34:01.969-07:002016-05-18T22:34:01.969-07:00You have been on my mind, I hope you are doing ok ...You have been on my mind, I hope you are doing ok my former Teacher. Your friend Calvin from Baymont Muskegon Mi. :)Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-19251385448754446152016-05-16T02:00:50.453-07:002016-05-16T02:00:50.453-07:00you're welcome... and then some.
bots hate lin...you're welcome... and then some.<br />bots hate links. and there are reasons.<br />i didn't look at these videos carefully<br />(it's a wonder i can link at all.... para-<br />phrasing the great rhymin' simon...).<br />but. and this is no tiny-little "but".<br />back around oh-nine or so, i rolled<br />out a bunch a drawings that, for all<br />the world, looked like *first drafts* of<br />the stuff in these videos. in hindsight,<br />sure, the p-by-p "grid" (with "p" a prime)<br />is more or less a "done deal"; how many<br />ways will there have been to visually<br />"add in" the (so-called) line at infinity?<br />still. whatever. it came as a pleasant<br />surprise to see that what i'd been hint-<br />ing at, had been done... and done well.<br />if it awaits the vi-hart treatment, then<br />so much the worse for vi hart. if she's<br />scooped me again, well, blessings.<br />it's good to know when one is entirely<br />outclassed. warmly. yours in the faith.<br />Vowen thomashttp://www.blogger.com/profile/09249915192605437832noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-72212322942966017802016-05-09T12:11:41.739-07:002016-05-09T12:11:41.739-07:00Cool link. Thanks. (It's me filtering spam.)
...Cool link. Thanks. (It's me filtering spam.)<br /><br />This links to a person who figured out how to organize the cards, so you can see the connections. She links to a paper she wrote and youtube videos she made explaining it all.Sue VanHattumhttp://www.blogger.com/profile/10237941346154683902noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-40075144042483082512016-05-09T11:54:58.114-07:002016-05-09T11:54:58.114-07:00http://www.donnadietz.com/Projective.html
here'...http://www.donnadietz.com/Projective.html<br />here's betting this gets stopped by googull's <br />spam filter.owen thomashttp://www.blogger.com/profile/09249915192605437832noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-78914021819002149542016-05-05T19:39:04.241-07:002016-05-05T19:39:04.241-07:00"i can't make it go back".
the sadde..."i can't make it go back".<br />the saddest song of our tragic era.owen thomashttp://www.blogger.com/profile/09249915192605437832noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-46121721393581189842016-04-30T12:02:23.054-07:002016-04-30T12:02:23.054-07:00Yep. I actually did not have that memorized when I...Yep. I actually did not have that memorized when I began teaching. I could derive it, but that didn't put the final form into quick recall memory. So I had it at the top of my notes when teaching, where I could glance down at it without students noticing. <br /><br />Nowadays I have it memorized, and I don't mind students knowing about my poor memory.Sue VanHattumhttp://www.blogger.com/profile/10237941346154683902noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-91040113388724300922016-04-07T05:08:49.499-07:002016-04-07T05:08:49.499-07:00I tend to agree with most of this! Very good post....I tend to agree with most of this! Very good post. The only thing I may remove, or rather edit, is the quadratic formula.<br /><br />Many educators feel that the quadratic formula isn't worth memorizing since it is derived from just completing the square (one being James Tanton who does a wonderful job of doing so in this video http://goo.gl/gNLwqL). So rather than just "memorizing the quadratic formula" perhaps "solving quadratics of any form" would suffice?<br /><br />Happy Math!Tim Robaczewskihttp://www.blogger.com/profile/09696435089972632673noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-68531888892366570552016-03-09T16:35:10.707-08:002016-03-09T16:35:10.707-08:00Link fixed. Thanks for pointing it out!Link fixed. Thanks for pointing it out!Sue VanHattumhttp://www.blogger.com/profile/10237941346154683902noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-59011786409569285582016-03-09T16:34:47.407-08:002016-03-09T16:34:47.407-08:00Lovely.Lovely.Sue VanHattumhttp://www.blogger.com/profile/10237941346154683902noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-51052103019580601292016-03-09T05:03:54.875-08:002016-03-09T05:03:54.875-08:00wow - what a list! Thank you for including some o...wow - what a list! Thank you for including some of our posts. <br /><br />Thought you might like to see a couple of the projects you mention with kids:<br /><br />The double Mobius heart one I did with a bunch of kids from the neighborhood - it was fun to see their reactions:<br /><br />https://mikesmathpage.wordpress.com/2015/05/31/cutting-a-double-mobius-strip/<br /><br />The strange harmonic series fact blew me away too - we played around with it and explored why it might be true:<br /><br />https://mikesmathpage.wordpress.com/2015/06/30/counting-and-a-fun-harmonic-series-fact/<br /><br />Also, I think there is a typo in one of the links - the link in "Sam Shah made this fabulous website" isn't working for meMike Lawlerhttp://www.blogger.com/profile/10864229310959004972noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-87314617839753807242016-03-07T19:45:30.302-08:002016-03-07T19:45:30.302-08:00Great linkfest! Isn't it amazing how much wond...Great linkfest! Isn't it amazing how much wonderful math there is for free on the web?<br /><br />The sailboat video is almost begging for a 3 act (a la Dan Meyer):<br />(1) act 1: opening still of the boat, already leaning a bit, bridge in the background.<br />What do they notice, what do they wonder? What info and data do they need?<br />(2) act 2: diagram showing height of bridge, length of mast (maybe also info on width of opening, depth of water, length of keel?)<br />(3) act 3: conclusion of video<br />(4) extensions: what about the keel? what is the largest boat that could get through? Boating wonderings: relationship between keel length and mast height? how heavy were the weighted bags? how did they achieve that leaning angle, how did they manage the angle of lean, and how did they bring the boat back upright?Joshua Greenehttp://www.blogger.com/profile/11702319994021721608noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-21761206922940106462016-03-03T20:01:17.224-08:002016-03-03T20:01:17.224-08:00I changed "much different" to "any ...I changed "much different" to "any better". Yes, they may be worse, but I don't feel a need to emphasize that. The point is, they aren't able to help students retain a love of playing around with math ideas.Sue VanHattumhttp://www.blogger.com/profile/10237941346154683902noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-65296418983615092672016-03-03T19:13:57.784-08:002016-03-03T19:13:57.784-08:00Re: "elementary teachers probably aren’t much...Re: "elementary teachers probably aren’t much different than the general population in this"... At this point there's quite a bit of research that elementary educators have the highest math anxiety (and weakest performance) of any college major; e.g., meta-analysis by <a href="http://www.madmath.com/2016/02/hembree-on-math-anxiety.html" rel="nofollow">Ray Hembee</a>. Deltahttp://www.blogger.com/profile/00705402326320853684noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-50439916349355575562016-02-04T20:45:17.354-08:002016-02-04T20:45:17.354-08:00My single favorite paragraph from Howard Eves'...My single favorite paragraph from Howard Eves' 2-volume Great Moments in Mathematics (Lecture 23):<br /><br />"Surely no subject in early college mathematics is more exciting or more fun to teach than the calculus. It is like being the ringmaster of a great three-ring circus. It has been said that one can recognize the students on a college campus who have studied the calculus -- they are the students with no eyebrows. In utter astonishment at the incredible applicability of the subject, the eyebrows of the calculus students have receded higher and higher and finally vanished over the backs of their heads."Deltahttp://www.blogger.com/profile/00705402326320853684noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-53897361572358187442016-01-22T06:35:49.890-08:002016-01-22T06:35:49.890-08:00Minday, please do join the Facebook group, 1001 Ma...Minday, please do join the Facebook group, <a href="https://www.facebook.com/groups/1001mathcircles/" rel="nofollow">1001 Math Circles</a>. People there will be glad to help you brainstorm.Sue VanHattumhttp://www.blogger.com/profile/10237941346154683902noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-54821983595309262132016-01-22T00:07:52.556-08:002016-01-22T00:07:52.556-08:00Thanks for sharing this. I have a 13 year old daug...Thanks for sharing this. I have a 13 year old daughter who would probably also say that she hates math. It has been a rough road for her. I am looking for ways to improve math in our homeschool. I like the idea of exploring math outside of a curriculum so much. I'm hoping I can figure out how it can work for our family. mindyhttp://www.blogger.com/profile/18281399488401861671noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-57392998656175474532016-01-20T01:04:17.167-08:002016-01-20T01:04:17.167-08:00I showed the quadrature of the parabola to my math...I showed the quadrature of the parabola to my math history students last year. It's astounding! (It's also pretty difficult, and you'll probably want to be able to have time to "follow along" on your own paper.) I liked this website, which has step by step diagrams to go with the text. http://web.calstatela.edu/faculty/hmendel/Ancient%20Mathematics/Archimedes/QuadraturaParabolae/QP.contents.htmlEvelynhttp://www.blogger.com/profile/08903667625039887922noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-36993528964296148702016-01-17T09:51:13.040-08:002016-01-17T09:51:13.040-08:00I love teaching calculus too. So many uses and you...I love teaching calculus too. So many uses and you are right about the interesting history of it. Julie Morganhttp://www.blogger.com/profile/17661941543916895182noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-1259324803634480912016-01-02T17:09:56.107-08:002016-01-02T17:09:56.107-08:00The circumscribed looks lots harder to figure out....The circumscribed looks lots harder to figure out. I'm not seeing the pattern yet.Sue VanHattumhttp://www.blogger.com/profile/10237941346154683902noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-37537633673126230092016-01-02T10:14:44.712-08:002016-01-02T10:14:44.712-08:00Yes. And your comment got me back to playing in ge...Yes. And your comment got me back to playing in geogebra and on paper, to try to figure this all out. I'm now working on a handout for my students.Sue VanHattumhttp://www.blogger.com/profile/10237941346154683902noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-35759898443538618282016-01-02T09:18:52.259-08:002016-01-02T09:18:52.259-08:00Archimedes also used a circumscribed hexagon as we...Archimedes also used a circumscribed hexagon as well, so he established not just a lower bound, but an upper bound.Buddha Buckhttp://www.blogger.com/profile/17167036913705912859noreply@blogger.comtag:blogger.com,1999:blog-5303307482158922565.post-62334976053290530172015-12-28T19:36:54.040-08:002015-12-28T19:36:54.040-08:00Yes. I don't know what hiccup in my attention ...Yes. I don't know what hiccup in my attention made me chop that up like that. I will fix it.Sue VanHattumhttp://www.blogger.com/profile/10237941346154683902noreply@blogger.com