### Volume 22, Number 28

 ``` July 14, 2017 Vol. 22, No. 28 THE MATH FORUM INTERNET NEWS Barefoot Math | Mathematical Enchantments | Lockhart's Latest -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- BAREFOOT MATH https://www.youtube.com/channel/UCGQGIza7FLnXPhqXll_3b6Q Last month, Jim Propp launched a YouTube channel of "low-tech videos about cool, accessible mathematics," with an accompanying site of moderated discussions: https://barefootmath.blog/ The channel opens with a series of clips that focuses on "Swine in a Line," a game invented by the professor at the University of Massachusetts. Swine in a Line starts with nine pigs and a row of nine pigpens. Players take turns putting pigs into pens until every last pen has exactly one pig in it. The player who put in the last pig wins. But as the first video explains, "something interesting happens" in between: https://www.youtube.com/watch?v=epbmEXr1o6s Propp has just posted a video of tips for how one could find the solution to Swine in a Line. In yesterday's segment, he emphasizes that "how one solves a puzzle is at least as important as what the solution is." Along the way, he touches on at least three strategies familiar to Problem of the Week subscribers: - solve a simpler problem - work backwards - look at cases http://mathforum.org/pow/support/activityseries/ -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- MATHEMATICAL ENCHANTMENTS https://mathenchant.wordpress.com/ Two summers ago, Propp observed "that math, in addition to being the way I earn my living, is something even more important for my happiness: it's a consolation for living in a world without magic." Since then, on the seventeenth of (nearly) every month, he has blogged with a stated goal of reawakening in his readers "a childlike relationship to the subject." Propp's Mathematical Enchantment posts have included-- - The Lessons of a Square-Wheeled Trike; - How To Be Wrong; - When Not to Expect What You're Expecting; - Believe It, Then Don't: Toward a Pedagogy of Discomfort; - Bertrand's Ballot Problem; - Reading, Writing, and Rigor; and - Will '17 be the Year of the Pig? -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- LOCKHART'S LATEST https://www.maa.org/sites/default/files/pdf/ devlin/LockhartsLament.pdf Fifteen years ago, Paul Lockhart stirred up math education with his critique "A Mathematician's Lament," still freely available to download from the Mathematical Association of America (MAA). This coming Monday, Lockhart's newest book comes out. According to "Arithmetic" publishers Harvard University Press, the research mathematician-turned-teacher presents the subject as "an elegant intellectual craft that arises from our desire to count, add to, take away from, divide up, and multiply quantities of important things." http://www.hup.harvard.edu/catalog.php?isbn=9780674972230 -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- CHECK OUT OUR WEB SITE: The Math Forum at NCTM http://mathforum.org/ Online PD http://mathforum.org/pd/ Online Workshops http://mathforum.org/workshops/ Ask Dr. Math http://mathforum.org/dr.math/ Problems of the Week http://mathforum.org/pows/ Powerful Problem Solving http://mathforum.org/pps/ Mathematics Library http://mathforum.org/library/ Math Tools http://mathforum.org/mathtools/ Teacher2Teacher http://mathforum.org/t2t/ Discussion Groups http://mathforum.org/kb/ Join the Math Forum http://mathforum.org/join.forum.html Ask Dr. Math Books http://mathforum.org/pubs/dr.mathbooks.html Facebook https://www.facebook.com/themathforumatnctm/ Blogs http://mathforum.org/blogs/pows/ Twitter Feed http://mathforum.org/pd/twitter.html SEND COMMENTS TO: http://mathforum.org/electronic.newsletter/mfin.faq.html#feedback _o \o_ __| \ / |__ o _ o/ \o/ __|- __/ \__/o \o | o/ o/__/ /\ /| | \ \ / \ / \ /o\ / \ / \ / | / \ / \ An archive of all the Math Forum newsletters and directions for subscribing can be found at http://mathforum.org/electronic.newsletter/ ```