X

# Posts

### January 25, 2015

+
A few weeks ago, we watched Nathan Kraft’s Soccer Ball Inflation video on 101 questions. What mathematical question could we explore? how many more pumps did it take to fill the bigger balls           1 how many pumps did it take to inflate the largest soccer ball    1 How many pumps did it take to fill […]
+
From 2008-2011, I served as a “math coach” in Pennsylvania.  The position was grant-funded, and there were no guarantees (or expectations, frankly) that the position would last beyond the first year.  The timing was perfect – I had been at … Continue reading →
+
Hop the Q-TRAIN: that is, the Quantitative Training Program, a postdoctoral research program supervised by Jennifer Hill, Marc Scott, and myself, and funded by the Institute for Education Sciences. As many of you are aware, education research is both important and challenging. And, on the technical level, we’re working on problems in Bayesian inference, multilevel […] The post Postdoc opportunity here, with us (Jennifer Hill, Marc Scott, and me)! On quantitative education […]
+
I just finished and uploaded a new product and, like many resources I create, it was born of necessity.  I'm working with six little Kinders who still can't recognize numbers to 20. To help with number recognition, I made half-page cards with the number, number name, and a ten-frame representation.  The ten-frame representation relates quantity to the number.  These cards can serve multiple purposes.  Once the kiddos are able to recognize the numbers, we can use the cards to […]
+
Here’s the follow-up to my last (reblogged) post. initially here. My take hasn’t changed much from 2013. Should we be labeling some pursuits “for entertainment only”? Why not? ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ I had said I would label as pseudoscience or questionable science any enterprise that regularly permits the kind of ‘verification biases’ in the statistical dirty laundry list.  How regularly? (I’ve been asked) […]
+
The accepted paper list!http://www.optimalmatching.com/MATCHUP2015/accepted-abstracts.html
+
Comparto applet interactivo que he realizado con Geogebra para trabajar en clase el estudio del límite de una función. Creo que es bastante intuitivo y fácil de usar. Basta introducir la función y el punto en el que queremos estudiar…Read more →
+
*Wik Only a moment to cut off that head and a hundred years may not give us another like it.~Count Joseph-Louis de Lagrange,a Comment to Delambre on Lavoisier's execution, 8 May 1794.The 25th day of the year; 25 is the smallest square that can be written as a sum of 2 squares. (What's the next?)There are 25 primes less than 100.& $$25 = 5^2$$ and \(2.5 = \frac{5}{2} *Math Year-Round ‏@MathYearRound (are there other examples like this?) EVENTS1635 Cardinal Richelieu widens the scope of […]

### January 24, 2015

+
canonicalmomentum: The Peano Axioms uniquely define the natural numbers, i.e. the numbers we use for counting. Here are some little pictures to illustrate them. The first two say there’s a long line of natural numbers, one after the other. The third one says the line has a definite starting point, instead of running infinitely far in both directions, or going in a loop. The fourth one says nothing joins the line partway along, and rules out another kind of loop. The fifth one says that […]
+
Recently, I found myself needing to find scatterplots that represented very specific values for the correlation coefficient r. This is something that has come up with teaching as well. Showing students scatterplots for many different values of r seems to really help them conceptually, especially with understanding that not every data set with the same value […]
+
The title is a little misleading as there's no way that I made it anywhere near a seventh of the way through one of the books. However, in keeping up with a goal to read more and to write more, I've uploaded four reviews to my reading blog, which started out as simply someplace for me to keep track of what I've read and of the plots and characters of the more obscure ones. Of the four books, all four were e-books, and only one of them I've ever actually seen in print. Two were fantasy, one […]
+
Here are two examples of animal “face” tee-shirts I saw advertised in The New York Times (of all places!0 and that I would not consider wearing. At any time. Filed under: Kids, pictures Tagged: animals, Asian lady beetle, fashion, tarsier, tee-shirt, The New York Times
+
With Venn Diagrams on the new UK GCSE Mathematics specifications (an excellent addition I believe), and also on other exam specifications, I thought I would update an earlier post on Venn Diagrams and collect resources together. CIMT is one of my Top … Continue reading →
+
I was playing around in our Zome Geometry book looking for a project today. Stumbled on chapter 12 in the book about Archimedean solids. Unfortunately as we are currently transitioning between houses, I didn’t have any green zome struts. Luckily we found a few shapes that we could make using only blues. The goals for…
+
I am happy to say that it is my first time I see a give-away that is maths related. I am so excited that I thought it would be such a good idea to share it with all of you. The give-away is on a Tumblr page: Curiosa Mathematica, and it celebrates its 10,000 followers. […]
+
We hear a lot about educational entrepreneurs these days. As a service to these bright young innovators, I have here a proposed product that can revolutionize the teaching of mathematics: the bobblehead instructor. Given a gentle nudge, the instructor will nod reassuringly and repeat one of the following phrases:"Looks good.""And now what do you do?""Let's try that.""Um-hmm."All kidding aside, when I was a high school math teacher, a substantial part of my day was spent doing just that. I […]
+
No summary available for this post.
+
+
Another post from Tap Into Teen Minds. Enjoy! Assessing students based on learning goals is great, but this new gamified approach I stumbled upon has potential to be a game-changer for my students. The post Standards Based Grading GAMIFIED With Badges appeared first on Tap Into Teen Minds.
+
5 Practices for Orchestrating Productive Mathematics Discussions Chapter 2: Setting goals and selecting tasks If I want my seventh graders to have a meaningful mathematical discussion I have to raise the level of thinking in the learning target. But it’s not over yet. I also need to select an appropriate task to support the learning goal. As […]
+
+
The areas of two rectangles formed on the legs of right triangle if drawn with vertices on a circle add up to the area of a rectangle on the hypotenuse
+
Overview In previous posts I’ve shown how the jvmr CRAN R package can be used to call Scala sbt projects from R and inline Scala Breeze code in R. In this post I will show how to call to R from a Scala sbt project. This requires that R and the jvmr CRAN R package […]
+
I decided for some unknown reason to play around with the idea of making mathematical Mr. Men this week. I got a bit carried away and have decided to (try to) make 3 a week. One will be a simple … Continue reading →
+
Good morning! In Kindergarten and Grade 1, students need practice subitizing.  That is, being able to recognize at a glance and name familiar arrangements of objects without counting.  It’s an important precursor to estimation, skip counting and multiplication, and depends on students’ understandings of conservation — that 5 is 5, no matter how it is […]
+
things-with-teeth: exponential63: castiel-has-been-found: bonequeer: angels-are-watching: Can we please talk about how our history teacher sent a barbie to the smithsonian as proof of the presence of man two million years ago please, for the love of God read the whole letter, there are tears streaming down my face rn this is the funniest fuckin thing I have every read.  clams don’t have teeth. ‘You may be quite certain that those of us who are familiar with your prior work in the […]
+
The international Biomedical and Astronomical Signal Processing (BASP) Frontiers workshop starts tomorrow. The proceedings are here.  The ski report lists Avalanche Level is rated "Considerable Danger" so it might be wise to stay warm and talk real science. Here is the program:Sunday January 25, 201513.00 - 14.30    Aperitif and standing lunch13.30 - 14.00    Lunch14.00 - 15.45    Free time15.45 - 16.00    […]
+
Here are my slides and my notes from my five minute Pecha Kucha-style presentation at Educon. The focus of my presentation was on my journey as someone who started his teaching as viewing students as mistake makers to being a teacher who views students as sense-makers.   I’m going to talk today about my journey from a teacher who tried to correct students’ mistakes to someone who paid attention to student thinking and participated in mathematical reasoning with my […]
+
Data una scacchiera n×n, siete capaci di colorare, utilizzando solo due colori, le sue caselle in modo tale che tutti i rettangoli di dimensione a×b (con a e b compresi tra 2 e n) che si possono formare al suo interno abbiano le caselle d'angolo colorate con entrambi i colori? Fino a che valore di n riuscite ad arrivare?Per esempio, se la scacchiera è 2×2, queste due colorazioni vanno bene:Questa, invece, va bene per una scacchiera 3×3:Insomma, non devono esistere rettangoli con le caselle […]
+
A few days ago I started reading Principles to Actions Ensuring Mathematical Success For All as part of a book study. As I was reading in preparation for our first session I came across a few ideas worth highlighting. Pages 18 and 19 discuss the four levels of cognitive demand in math classes.   Along with expectations, […]