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Posts

August 20, 2014

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11:00 PM | On This Day in Math - August 21
As for methods I have sought to give them all the rigour that one requires in geometry, so as never to have recourse to the reasons drawn from the generality of algebra. ~Augustin-Louis CauchyThe 233rd day of the year; 233 is the only three digit prime that is also a Fibonacci number. (Are there any four digit ones?)EVENTS1560 The occurrence at the predicted time of a solar eclipse in Copenhagen turned Tycho Brahe toward a life of observational astronomy. *VFR Thony Christie has stated that it […]
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9:43 PM | Maths in Dance - Joel and Ana Masacote
Dancers are busy people - and no two are busier than Joel and Ana Masacote, legends in the field of Latin Dance. So, it was really great to get a reply from Ana saying that Joel and she would also love to participate in the "Maths in Dance" project. I realise we are a few weeks past the end of August but this was too good an offer to let slip past. So, who are Joel and Ana Masacote?This husband and wife team is one of the most sought after in salsa/mambo. Respected for their artistry […]
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9:27 PM | Ascending The Eigen - a.k.
In the previous post we covered eigensystems of two by two matrices, being the set of unit eigenvectors vi and eigenvalues λi that satisfy the relation   M × vi = λi × vi To find the eigenvalues of a matrix M we solved the characteristic equation   |M - λi × I| = 0 Now for a two by two matrix this was a simple quadratic equation that we could solve with the equation we learnt in school. […]
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9:11 PM | Introducing functions and their equations
We have been studying linear and nonlinear patterns in Prealgebra the last week and a half.The students are all great at creating tables and graphs from those patterns, and most can identify an expression for any figure in the pattern, so I thought that would be a natural introduction to slope and intercepts. We have taken the old patterns and tables and graphs from the last 1.5 weeks and identified the slopes and y-intercepts for each one, and even looked at nonlinear examples. I want students […]
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8:50 PM | Astroboy: Il gatto rosso e altre storie
Il gatto rossoLa prima reazione di uno straniero alla Tokyio del duemila è di stupore di fronte a una strana metropoli che mescola alla rinfusa la civiltà progredita del ventunesimo secolo con le antichità del ventesimo.Passeggiando per Musashino non devi scegliere che strada percorrere. Puoi essere pago del percorrere senza meta le sue vie che ti condurranno in luoghi singolari e se per caso chiedi indicazioni a un passante non te la prendere se questi risponderà gridando. La strada […]
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8:12 PM | Benson Farb’s ICM talk
One of the things I’ve been spending a lot of time on mathematically is problems around representation stability and “FI-modules,” joint with Tom Church, Benson Farb, and Rohit Nagpal.  Benson just talked about this stuff at the ICM, and here it is: In the latest stable representation theory news, Andy Putman and (new Wisconsin assistant professor!) Steven […]
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7:52 PM | union of countable many countable sets proof
updated proof
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7:27 PM | union of countable many countable sets
newest proposition
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7:21 PM | “What feedback would you give?”, continued
In a previous post, lots of commenters said that they didn’t feel that you could give helpful, written feedback because there wasn’t enough evidence of student thinking on the quiz. Given that complaint, it might be interested to see how those same teachers would give written feedback on a quiz that gives significantly more evidence… Continue reading →
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6:32 PM | Schummeln und Spionieren mit Smartwatches
Ohne auf das (für sich selbst sprechende) “Neuland”-Zitat unserer Kanzlerin anspielen zu wollen, ist die technische Entwicklung der vergangenen 10 Jahre atemberaubend.Das Schule stark von der Politik bestimmt wird, bemerkt man (auch) daran, dass wir es kaum schaffen, mit dem technischen Fortschritt mitzukommen.Während ich mich noch ohne Wikipedia zum Abitur … Continue reading →
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5:59 PM | One thing I’m trying to do better this year
I’ve never taught young kids before so learning how to communicate math ideas to the boys has been a challenge.  A fun challenge, to be sure, and something I’m constantly trying to do better.   One benefit of filming a little … Continue reading →
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5:37 PM | 414/514 Advanced Analysis (Analysis I) – Syllabus
Instructor: Andrés E. Caicedo Fall 2014 Time: MWF 10:30-11:45 am. Place: Mathematics building, Room 139. Contact Information Office: 239-A Mathematics building. Phone number: (208)-426-1116. (Not very efficient.) Office Hours: W 12:00-1:15 pm. (Or by appointment.) Email: caicedo@math.boisestate.edu Text We will use three textbooks and complement with papers and handouts for topics not covered there. MR1886084 […]
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3:45 PM | Talking Math with My Kids
I’ve gotten so many great ideas from Twitter that I wouldn’t know where to begin describing them all. One of my newest favorite ideas comes from Christopher Danielson and his “Talking Math with Your Kids” project. As he points out, Parents know that … Continue reading →
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2:45 PM | Stealing this....
Thank you @Stavenski for posting. :)
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12:30 PM | Creativity is the Soul of Mathematics
Can you generate a 3 or 4 or 5 leafed rose with this?The original file is here. 
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12:30 PM | Creativity is the Soul of Mathematics
Can you generate a 3 or 4 or 5 leafed rose with this?The original file is here. 
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12:26 PM | 2 Filipinos Win Gold and Bronze Medal in 2014 CWMO
Share it!In 2014 China West Mathematical Olympiad (CWMO) held at Jiu Ling Po District, ChongQing Province, China on August 14 – 18, 2014. 2 young Filipinos won the Gold and silver medal as they fight against... The post 2 Filipinos Win Gold and Bronze Medal in 2014 CWMO appeared first on Techie Math Teacher.
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11:57 AM | “Dead Poets Society” for Skeptics (or, How to Inspire Your Way into a Godawful Mess)
As guiding principles go, “carpe diem” seems to have all the intellectual heft of a Dos Equis commercial. Continue reading →
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9:00 AM | Arccosine: secrets of the Mathematical Ninja
“$\cos^{-1}(0.93333)$, said the student. A GCSE student, struggling a little; the Mathematical Ninja bit his tongue rather than correct him to $\arccos$ or to $\frac {14}{15}$; he also accepted, grudgingly, the answer was going to be in degrees. “Maybe 21 bad degrees?” “21.04”, said the student. “Not too terrible.” “I suppose you’re wondering,” said the Mathematical Ninja, directly to camera, “how I did that. Well, let me tell you. It went down like this: * Work out […]
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5:23 AM | Crewton's Math Manipulative Manifesto
Math Manipulatives Here is an article I wrote about math manipulatives for my website directing people to this blog. Some of the points here will be covered in more detail in the next parent teacher training. Math Manipulative Manifesto "Learning is not the product of teaching. Learning is the product of the activity of learners." ~John Holt This blog is dedicated almost exclusively to showing you how to use manipulativess with your children at your house whether you home-school or not, and […]
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5:04 AM | Privilege
The word privilege is being spoken and written many times over. Within the past couple of years I’m seeing and hearing privilege used in an undeniably distinct context. (Or it could be that I was unknowingly and partially deaf and blind to this context.) The word is written on cardboard signs, on people’s faces — and no matter what surface […] The post Privilege appeared first on Finding Ways.
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3:12 AM | Mathematical Autobiography Foldable
How is it possible to already be this far behind with blogging after the FOURTH day of school?!?  Oh, yeah.  It might be due to the fact that I still have lessons from last school year that need to be blogged about.  And, I have yet to finish my #TMC14 reflections.  I feel like I've been constantly on the go since July.  I guess this is the life of a teacher. This year, I decided I wanted to have my students write a mathematical autobiography.  Not wanting to […]
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2:54 AM | Day 4 Activities and My Year 6 Classroom
Day 4 was our mandatory first administration of end of course exams.And...that's all I have to say about that.Now time for the fun stuff....decorations!I'm starting with my classroom door and then going around in a circle...I mean slice of an octagon.My sign at the top says Teacher of Awesome and by "awesome" I mean "math"I clip the menu, calendar, ineligible list, and after school detention list to the door.My exit ticket tubs and function family poster.My chevron bulletin board...I think I […]
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2:51 AM | BOOST the Learning!
Have you heard the big news?  Teachers Pay Teachers is having a special, ONE DAY sale on August 20th. Perfect in case you missed the big back to school sale a few weeks ago or found you needed more materials.  My store is on sale for 20% off, and you can use the promo code BOOST when you check out for an additional 10% off!Be sure to check out my Back to School Essentials!
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1:00 AM | Distinguishing Between Webb’s Depth of Knowledge Levels
The most straightforward method I have found for distinguishing between the first three levels of Webb’s Depth of Knowledge (DOK) is to take a single mathematical concept and provide a problem at each DOK level. Here are three examples that illustrate the differences well using: fractions on a number line perimeter and area surface area and […]
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12:44 AM | Reading in Math Class
For years, I have tried to share a related article as appropriate with my classes.  Often times it was a news article related to a data collection lab.  However, I feel more impact for reading in math class is from informational reading with graphs/data related pieces.  One day each week, I plan to use a […]
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12:29 AM | Great Growth Mindset Video
Great, short video on Growth Mindset that I emailed out to all of my students a few moments ago.  I believe many of them think I am crazy for discussing this topic with them this past week.  However, I firmly … Continue reading →
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12:10 AM | Embrace the Drawing Board 2: Electric Boogaloo: Return of the Meerkat
Hello, I am Timon Piccini.  You may have heard of me before, and mispronounced my name in your head as you read one of my blog posts. Where have I been though? I have left my blog alone over the last year and been a relative ghost on the Twitterverse-sphere-munity. I don't like that, not at all. It took a little bit of guilt @lisabej_manitou @hs_math_phys @MrPicc112 Oo yeah. Remember when Timmon used to make this stuff on the regular?— Dan Meyer (@ddmeyer) August 5, 2014 and so […]
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12:06 AM | AP Stats sampling vocab
Want to watch an ap stats classes eyes glaze over? Start talking to them about stratified vs. cluster vs simple random sample vs judgement sampling.  photo via Really. Pull the powerpoint from the book, throw it on the screen, and watch the light dim from their eyes. I didn’t do that. …. This year. I […]

August 19, 2014

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11:41 PM | Crewton's Manipulative Manifesto
Here is an article I wrote about manipulatives for my website directing people to this blog. Some of the points here will be covered in more detail in the next parent teacher training. Manipulative Manifesto "Learning is not the product of teaching. Learning is the product of the activity of learners." ~John Holt This blog is dedicated almost exclusively to showing you how to use manipulativess with your children at your house whether you home-school or not, and also to get you to use them in […]
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