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# Posts

### November 21, 2014

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The statement in red here is one I came across while taking another look at Common Core standards. I decided to Google the statement. I did discover that Google will not let you use more than 32 words between quotes, so I Googled just the 1st sentence in quotes (so Google looks for an exact match), and got 14,100 hits. Listed below are just a few of them.There is a world of difference between a student who can summon a mnemonic device to expand a product such as (a + b)(x + y) and a student who […]
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My older son is finishing up a chapter about right triangles in his Geometry book.  The last section in the chapter discusses how to construct perpendicular lines.  This topic has come up a few times previously, so I dedicated a … Continue reading →
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Triangle from angle A, m_b, h_a
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The Michigan Council of Teachers of Mathematics (MCTM) would like to share the latest information from the Michigan Department of Education (MDE) informing educators across state on the new spring 2015 summative assessments. MDE has listed three key points: MEAP is replaced by the M-Step (Michigan Student Test of Educational Progress) test.Both Michigan developed content as well as Smarter Balanced Assessment Consortium (SBAC) content will be included on the Spring […]
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Before I moved all my action items to Trello, the “Things” app was my favorite To-Do list for getting things done (‪#‎GTD‬). It’s free this week if you want to try it out. I think they have separate apps for iPhone and iPad, so if you have both you might go ahead and get it […]
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This was my favorite lesson of the year so far.  This was for Accelerated Algebra 2, sophomores and juniors.  We just did the lesson on radicals and are reviewing for the quiz.I found a lesson on Teachers Pay Teachers and changed it so it was radicals and teachers in my school.  It was a lot of work to create the 10 problems, make them all work to reveal the answer correctly, and I was worried it might not be worth the time - would it be too easy, too hard, too short, or too […]
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Last week, we featured a problem about Analytical Geometry that can be solved using the concept of perpendicular bisector. This week, we will be tackling a problem about series. How good are you in... The post TGIF Problem of the Week 12 appeared first on Techie Math Teacher.
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I received this story in an email and thought it was very encouraging and heart-warming! True story. I asked Scott for his permission to post it online.In the beginning he is referencing this article of mine (I sent it to my list last year):http://www.mathmammoth.com/lessons/value_of_mistakes.php Enjoy... and SHARE. :)Hello Maria, I am just NOW ... today reading this email from about one year ago. I know terrible, but late than never, right. Anyway, I wanted to write you and tell you […]
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This could form an interesting investigation for students studing the parabola. How can you use a parabola to multiply two numbers? Find out how. The YouTube description includes an online demonstration (Desmos) and there is a GeoGebra version.
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Una faceta muy poco conocida de Blas Infante es su tarea como escritor y como defensor de los derechos de los animales. Aquí tenéis un escrito suyo. BLAS INFANTE Los mandamientos de Dios en favor de los animales Amarás a … Sigue leyendo →
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Cryptography Online Course Good news for you who are interested in Cryptography, which is at the intersection of mathematics and computer science. Highly useful both in everyday life and also in top secret projects, like the cracking of the Enigma … Continue reading →
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I recently gave a public talk about George Green’s mathematical education and influences, the audio for which is now available online. Green attended Robert Goodacre’s school in Nottingham 1801-2 and took part in scientific culture in Nottingham, including at Bromley House Library, in the 1810s and 20s, before going to Cambridge in 1833. I speak... Read more »
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Midpoint Reciprocity in Napoleon's Configuration
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Longitude, Latitude and Distance to the Equator
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Law of Cosines by Ancient Sliding
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The shortest route for a spider to reach a fly seems obvious in this rectangular room, but Rob shows that it might be trickier than it seems.
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Kim Kardashian’s butt on Paper magazine cover can help kids do math: Jeanette Settembre and Zoe Lake: Kim Kardashian’s naked butt broke the internet — but now it’s helping to fix students’ understanding of basic geometry. [source: mme rss]
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The Origin of the Number Zero: Amir Aczel: Four miles from the great temple of Angkor Wat, deep in the Cambodian jungle, I opened the door of a makeshift shed with a corrugated tin roof and walked into a dusty room painted in pale gray. Thousands of chunks and slabs of stone covered the dirt floor: smashed heads of statues of Khmer kings and Hindu gods, broken lintels and door frames from abandoned temples, the remains of steles with ancient writing. After years of searching, I’d finally […]
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I've written more about the Socrative app/website before, but have been tasked with presenting in a slim 25 minute window to our school staff, so I wanted to refine my experience to the elevator pitch. Socrative is... an app a website You can use Socrative on... PCs Macs Tablets Smartphones I've used Socrative for... exit slips quick check-ins surveys test review quizzes unit exams
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Is “blended learning” a trend? I think it would be easy to call “blended learning” a trend. It seems to be rather popular in education right now. There are lots of grants available to support it. Instructional technology is a common talking point among reformers. Many teachers in many schools are experimenting with it, some […]
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The Monty Hall Problem is one of the famous puzzles that is not very easy to understand.  When Marilyn vos Savant (listed as Highest IQ by Guiness) posted this question in “Ask Marilyn” of Parade magazine, 10,000 readers including 1000 PhD holders wrote to the magazine asserting that Marilyn was wrong despite explanations and mathematical calculations […] Math and Multimedia - School math, multimedia, and technology tutorials.
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The shortest math joke ever: let $\epsilon < 0$found on Mathematical humor collected by Andrej and Elena Cherkaev The 325th day of the year; 325 is the smallest number that can be written as the sum of two squares in three different ways. (What is the next such number?)EVENTS1675 Leibniz completes the product rule. In a manuscript only days earlier Leibniz had struggled with the product and quotient rules for differentiation. At ﬁrst he thought d(uv)= du dv. *F Cajori, History of […]

### November 20, 2014

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Hierboven zie je een vlakvulling die bestaat uit regelmatige achthoeken en vierkanten. De oppervlakte van zo'n regelmatige achthoek is gelijk aan 6 cm2.Bereken exact de oppervlakte van zo'n vierkantje.Zie...
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I ran my second Tech Thursday after school today with some exploration into Chrome extensions and a quick glimpse at Google Add-Ons. I'm happy with the numbers - I had 8 attendees last week and 9 today (3 repeat customers from last week). It's interesting to see the variety of people; today there were two lunch ladies, our ESL teacher, a Spanish teacher, a math teacher, the school psychologist, an administrative assistant, and one special ed teacher.  And the 9th person was a lady who was […]
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CCSS-M.G-CO.C.9. Prove theorems about lines and angles. Theorems include: vertical angles are congruent; when a transversal crosses parallel lines, alternate interior angles are congruent and corresponding angles are congruent; points on a perpendicular bisector of a line segment are exactly those equidistant from the segment’s endpoints. After proving that vertical angles are congruent, we turned […]
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Saw this post on twitter tonight: The exercise for the students is a neat one involving biased and unbiased dice.  If you read the Twitter thread a little further you’ll see suggestions about running Chi squared stats, too.  All great … Continue reading →
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Yesterday was an exciting day in the school-tech world, as a group of educators met at the White House and discuss education policy relating to technology – specifically the access and cost of broadband for students. A special daytime version … Continue reading →
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تصحيح تمرين12 حول دراسة الدوال وتمثيلها المبياني  في ما يلي، تصحيح التمرين رقم 12 حول درس "دراسة الدوال العددية وتمثيلها المبياني" للثانية بكالوريا علوم فيزيائية ورياضية، وهدا التمرين يشمل النهايات والاتصال والاشتقاق والفروع اللانهائية ثم انشاء المنحنى. اسئلة التمرين 12 […]
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The Baffling and Beautiful Wormhole Between Branches of Math: Lee Simmons: Math geeks extol its beauty, even finding in it hints of a mysterious connectedness in the universe. It’s on tank tops and coffee mugs. Aliens, apparently, carve it into crop circles (in 8-bit binary code). It’s appeared on The Simpsons. Twice. [source: mme rss]
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Comencem un petit recull de posts lligats amb la mesura. Aquest primer post dedicat a la mesura de massa.L'esquema de presentació de les activitats, que és el mateix per a les demés mesures,  està desenvolupat en tres apartats: comparar i ordenar (en el que es treballa el concepte) ús d'unitats i ús d'instruments. www.flickr.com Comparar i ordenarComparar: sospesar dos objectes per comparar-los i veure quin és el que ens costa més d'aixecar porta implícit el concepte de […]