### Volume 22, Number 10

 ``` March 10, 2017 Vol. 22, No. 10 THE MATH FORUM INTERNET NEWS Summer Workshops for Math Teachers Desmos Teaching Fellowships | The Eratosthenes Experiment -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- SUMMER WORKSHOPS FOR MATH TEACHERS http://www.mathedpage.org/summer/ Henri Picciotto has announced his geometry workshops for the summer: - Hands-On Geometry (grades 6-10) - Transformational Geometry (grades 8-11) Since his most recent appearance in these pages, Picciotto has received the 2016 George Polya Award from the Mathematical Association of America (MAA), and has delivered this Ignite talk: https://www.youtube.com/watch?v=QoX6lnqzXUs Thanks to the generosity of an anonymous donor, the first seven public school teachers to register for each of Picciotto's workshops will enjoy substantial savings on the tuition. For course descriptions and more details, check out the registration page: http://www.headroyce.org/community/summerinstitute -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- PoW taking place: Math problem-solving moment of the week "After considering these expressions and not being able to think of a way to solve for any single variable, I realized that I could rewrite Tuesday's data in terms of Monday's like so.... When I noticed that Wednesday's expression could be solved since it has a set equal value, I immediately did so. I started by distributing the inner 2 to the 80 and negative x.... I combined the like terms, then used inverse operations to isolate the variable x." - Nicholas, highlighted in the Algebra PoW's latest solution http://mathforum.org/pows/solution.htm?publication=4860 -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- DESMOS TEACHING FELLOWSHIPS http://blog.desmos.com/post/157870597332/ Also taking place in the Bay Area later this summer: Desmos' second cohort of teaching fellows. The creators of the popular free online graphing calculator, first highlighted in these pages four years ago, will send a group of teachers on an all-expenses-paid trip to its headquarters. Fellows will then spend a long weekend talking math and pedagogy, enjoying first looks at every new feature and activity produced by Desmos, and seeing their input folded into its public releases. New to Desmos? Check out this selection of activities posted by Chief Academic Officer Dan Meyer last month: http://blog.mrmeyer.com/2017/here-are-ten-new-desmos-activities/ Powered under the hood by a new scripting language, these ten activities reflect the company's digital mathematics pedagogy, refined through daily conversations, lesson pitches, lesson critiques, lunch chats with guests like the Khan Academy research team, and frequent consultation with the inaugural class of Desmos Teaching Fellows: http://blog.desmos.com/post/150453765267/ Apply before the end of the month to experience Desmos technology from the inside: http://learn.desmos.com/fellowship -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- Now taking place: Math education conversation of the day "I'd bet this would be a good activity! So hard to think of things that are so different than my own way of thinking." - Paula, tweeted to @MFAnnie during #elemmathchat https://twitter.com/PaulaKrieg/status/840034157375942656 -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- THE ERATOSTHENES EXPERIMENT http://eratosthenes.ea.gr/ How big around is Earth? Step outside and measure it in a few weeks alongside more than a thousand schools from the United Kingdom, Greece, and China, to name just a few. At their respective noontimes on the equinox, March 21, students the world over will measure the length of shadows cast by sticks, then consult observations made by others at the same longitude. By sharing these data, invoking the properties of right triangles, and applying proportional reasoning to angular distances, students will obtain a good measurement of our planet's size, which was a feat first documented by Greek astronomer Eratosthenes in 240 B.C. Find elementary school and high school lesson plans in eight languages here: http://eratosthenes.ea.gr/content/lesson-plans Photograph your experiment and submit it to Europe's Inspiring Science Education for a chance at scholarships to attend its summer academy in Athens: http://eratosthenes.ea.gr/content/photo-contest-march-2017 First featured in these pages two years ago, the Eratosthenes Experiment is organized with support from the European Commission in the context of the Seventh Framework Programme (FP7). Similar past initiatives, also mentioned here over the years, have sometimes called this activity "the Noon Day Measurement." -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- 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/ ```