# Posts

### August 30, 2015

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3:39 AM | The Coin Game, II

Good answers to the last question! I think I perhaps put my thumb on the scale too much by naming a variable p. Let me try another version in the form of a dialogue. ME: Hey in that other room somebody flipped a fair coin. What would you say is the probability that it fell […]

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After writing my inaugural blog post, A First Grade Teacher Enters The Math World, I have spent some time searching for and thinking about mathematical leaders to follow in the primary grades. It is easy to find leaders at the high school and middle school levels, and I have come across many in the elementary level, but there are far fewer who really specialize in the primary grades, at least far fewer who are vocal and make themselves accessible in online learning communities like
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2:33 AM | Using Twitter for Awesome

For many years, Twitter just didn't make any sense to me. I understood how it worked at a technical level, but I didn't understand why anyone in the right mind would want to use it. Over the years, I had a few levels of epiphanies, so I thought I would share for anyone who is still on the fence.Twitter for learning who's out there and what ideas are taking off:Back in college, I took a leave of absence with five friends to start an EdTech company. One of the things that we […]

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1:13 AM | The NY Times’s 8th grade math questions

Saw this tweet earlier today from Daina Taimina: A direct link to the NYT article is here: 8th grade math questions in the NYT I’m terrible at determining what sorts of questions will be difficult for kids, so I asked my older son (who is going into 6th grade) to talk through them. Here are…

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Here's an idea for getting your math year off to a great start... When I posted about Math Journals & Notebooks, I mentioned that I loved the idea of having children make covers relating math to themselves as Courtney shares at A Middle School Survival Guide. Ideally, I'd begin the lesson by reading aloud a book that relates math to everyday life. (I mention several suggestions here.) When I first considered what might go on a cover, I didn't have a lot of ideas. I just thought about # of […]

### August 29, 2015

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11:00 PM | On This Day in Math - August 30

Frustra fit per plura, quod fieri potest per pauciora.It is vain to do with more what can be done with less.~William of OckhamThe 242nd day of the year; 242 has six divisors...but 243, 244, and 245 also each has six divisors. 242 is the smallest integer to begin a run of four consecutive integers all of which have the same number of divisors. (What is the smallest integer that begins a run of three consecutive integers with an equal number of divisors?) (see bottom of post for spoiler)242 is […]

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10:40 PM | Excel for Mathematics General

The Mathematics General (Stage 6, Years 11 and 12) syllabus in NSW includes numerous content points, considerations and suggest applications involving spreadsheets. But, I suspect, many teachers are not using spreadsheets in their lessons mainly because you get through the course without using them. Yet using a spreadsheet to complete some of the mathematical heavy lifting, can allow for the use of real-life data and the investigation of scenarios.

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10:28 PM | Day 20.5 – A little help?

I haven’t written for a couple of weeks. This is largely because I don’t have any lessons to share. Nice way to start the year: out for training one or two days a week for the first month. I’m supposed to have another day this week, but I’ve already cancelled my requested substitute. I’m not […]

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Ok, I’ve been back in. Again. To be completely honest, I’ve lost much of the last week to Pinterest, a new addiction for me, where I have found some AWESOME ideas for improving teaching and learning in my classroom. My husband would be more annoyed by it if I weren’t passing along quite a few […]

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9:18 PM | A better space for learning

In my last post about our new extended Algebra 1 class, I mentioned the possibility of a new room. I have an amazing school and awesome colleagues because, one week later, I'm moved in and ready to roll.My old room was a computer lab with heavy, unmovable desks. When I first moved in, I unplugged everything and rearranged it into a large U-shape to make it easy to collaborate with peers, quickly turn for a lecture or discussion, and for me to see every screen. I loved having a […]

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8:13 PM | Topolino #3118: misteri misteriosi

Come da consuetudine delle settimane precedenti, ecco la del numero di Topolino attualmente in edicola, assemblata integrando al testo utilizzato per la brevisione su LSB (che dovrebbe uscire domani) i commenti sul resto del sommario, che inizia con Paperink e il nipote ribelle.A differenza di quanto scritto nel titolo tale nipote non è Paperino, ma Felipe De Donlon y Pesetas, nipote di Dona Manuela Danarosa, introdotta da Marco Bosco, sceneggiatore de Il nipote ribelle, e Giorgio Cavazzano in […]

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Originally posted on Reflections of a Second-career Math Teacher:Posting my comments to Larry Cuban in response to his post titled “Evidence: The Case of the Common Core Standards.” Larry shines a spotlight on the lack of research behind the…

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7:08 PM | Burned Out Teachers (Part 2)

Originally posted on Larry Cuban on School Reform and Classroom Practice:There are three ways to reduce the kind of burnout that so many K-12 teachers, particularly in low-income minority schools such as Spanish teacher Alli Baugher at Ballou High…

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6:15 PM | summer recapitulation

What a fantastic, and fantastically long summer. This summer, I: Drove across the country – twice Drove through 22 states + D.C. (South Carolina was accidental.) Attended Brentwood High School and Flint Hill graduation ceremonies Visited the Museum of Mathematics in NYC Saw Sol LeWitt, Richard Serra, and more at Dia: Beacon Went to two […]

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5:49 PM | #Teach180 Awesomeness

We're seven days into school, and I've only blogged about the first two days. Not off to the best start. But, I am proud of myself for tweeting a #teach180 picture every day. Hopefully these pictures will all become blog posts of their own some day. I'm so excited about all the awesome people who have joined in with me to tweet something from their classroom every day!In an attempt to persuade you that you MUST check out this hash tag, I'm going to post some of my […]

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3:40 PM | Focus is Key

I have resolved to work on blogging once a week, because I need it, and hopefully it will help me to re-prioritize in a meaningful way. If it helps someone else, all the better. This week felt very chaotic. I’m finding that having Mondays as our meeting days can make a week feel that way, […]

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3:24 PM | The coin game

Here is a puzzling example due to Roger White. There are two coins. Coin 1 you know is fair. Coin 2 you know nothing about; it falls heads with some probability p, but you have no information about what p is. Both coins are flipped by an experimenter in another room, who tells you that […]

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3:12 PM | New Geometry Unit 0 — Intro to Logic

Since, as @samjshah reminds me, we blog partly as an reflective archive for ourselves, I wanted to capture some of what I did in the new introductory logic unit I created for Geometry this year. I also wanted to capture some of who and what inspired me to do the things that worked out best!I had no idea how prescient it would be to have an introductory unit that both adds tremendous rigor and depth while simultaneously being somewhat optional. These first two weeks of school have been somewhat […]

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For reasons that are somewhat mysterious to me, I’ve seen a bunch of media coverage about John Conway in the last couple of months. Of course, there’s Siobhan Roberts’s awesome biography: Which Jordan Ellenberg reviews in the Wall Street Journal here: Jordan Ellenberg’s review of Genius at Play Roberts also has a great Quanta Magazine…

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1:08 PM | Beginning the Year with Math Journals

Last Monday marked the first day of my 2015-16 school year. It’s been an amazing week but I’m glad the weekend is here. Yesterday my school had its annual PTO picnic and I now have some time to write. I feel like I need time to process and reflect on the whirlwind of events that’ve […]

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11:22 AM | Maths Mr. Men Sticker Template

With many thanks to @luby_lou99 who made these entirely independently. They’re very cool, and more cost efficient than the ones I made for my classes! Maths Mr Men Sticker Template Just use the template and get some stickers like these (or on ebay here) :D

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10:52 AM | Resolutions for (Mathematics) Teachers

It’s that time of year again – back to school we go. Time for a revisit and update of “Resolutions for Maths Teachers”. There are several new slides here for those familiar with the previous edition. I am happy to … Continue reading →

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10:31 AM | Scienza in Pillole: la Teoria delle Stringhe

Fonte dell'immaginePrende il via, con la seguente pillola scientifica, la rubrica Scienza in pillole, pensata per offrire ai lettori degli input veloci e corretti, pescando nel mare magnum della conoscenza scientifica. La Teoria delle StringheLa teoria delle stringhe propone che i costituenti fondamentali dell'universo siano "stringhe" unidimensionali, piuttosto che particelle puntiformi. Le stringhe hanno quindi un'estensione, in altre parole hanno una lunghezza (1). E
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10:24 AM | Complete the Rules

I said I wouldn't write any more posts this summer, but this is just a quick one to share something I've just made.
You may have already seen the expectations videos I made for Year 10 and Year 11. I was considering making these for Year 12 and 13 too but wasn't sure it would work well with these groups. Then I stumbled across this infographic that I made last year and never had the chance to

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9:27 AM | Salaries in Real-Time

Find out how many hours of work it takes to buy a burger, top performance running shoes, a flat screen television, a new car, and even a home. (US Values)
An engaging visualisation that might help students gain perspective on their own job and spending.

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7:22 AM | Schülerarbeit: Ein Dialog.

Hr. Klinge: “Hallo Ramona.” Fr. Stock: “Hallo Jan-Martin. Hast du schon von Emil und Laurin gehört? Hr. Klinge: “Das die zwei wieder im B-Trakt waren? Ja, das habe ich. Herr Müller war ziemlich wütend darüber.” Fr. Stock: “Kann ich verstehen. Ich weiß auch nicht, wie wir sie daran hindern können.” Hr. Klinge: “Ja, das Abschreiben lassen bringt wohl nicht viel!” Fr. Stock: “Vielleicht sollten wir sie mal einen Dialog darüber schreiben lassen, was wir über das Thema […]

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I met up with some mathematician friends in Toronto yesterday, who were interested in how one goes about getting started on machine learning and data science and such. There’s piles of great resources out there, of course, but it’s probably worthwhile to write a bit about how I got started, and place some resources that […]

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1:54 AM | Embracing Her Rules

I want to preface this post with a declaration: My daughter Maria is the love of my life and being her mother is my greatest blessing. That being said, to describe her as a “free-thinker” would be a sugar-coated understatement of my little non-conformist. (I mean would it kill her to play one game of […]