Den Rattee (@DenRattee) profile picture

Den Rattee

@DenRattee

math teacher turned math coach. juggler, cyclist, racquet sport enthusiast, player of many games #MTBoS #iteachmath

 Calgary
Joined February 2011
  • Tweets235
  • Following205
  • Followers75
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Photo by Den Rattee (@DenRattee)Photo by Den Rattee (@DenRattee)Photo by Den Rattee (@DenRattee)Photo by Den Rattee (@DenRattee)Photo by Den Rattee (@DenRattee)Photo by Den Rattee (@DenRattee)
Sounds like an oxymoron, but let's make sure doing algebra is algebraic thinking! (eg How do you know the sum of any five consecutive integers is sure to be a multiple of 5? Is the sum of any six a multiple of 6? When is a sum of k consec integers sure to be a multiple of k?)
Sunil Singh (@Mathgarden) profile pictureSunil Singh@Mathgarden21 Nov 2018
medium.com/@sunilsingh_42118… .@jamestanton
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In the end, we need kids--as many kids, if not all--to fall in love with mathematics. That is the endgame. Not higher standardized test scores that don't even measure anything worthwhile. Mounds of data is meaningful if the test is...
Garland Linkenhoger (@GarlandLinkenh1) profile pictureGarland Linkenhoger@GarlandLinkenh125 Oct 2018
Why I fell in love with monster prime numbers (Adam Spencer | TED2013) ted.com/talks/adam_spencer_w… via @TEDTalks @MVPSchool @treyboden @chrisandres003 @_robinmatthews @ChipHouston1976 17 minutes amazing one liners make math transdisciplinary and relevant and FUN. come into geekdom
Why I fell in love with monster prime numbers

Why I fell in love with monster prime numbers

They're millions of digits long, and it takes an army of mathematicians and machines to hunt them down -- what's not to love about monster primes? Adam Spencer, comedian and lifelong math geek,...

ted.com
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Den Rattee retweeted
Desmos (@Desmos) profile picture
Desmos@Desmos25 Oct 2018
🎉🍰🤸‍♂️ Get wild, y'all. We just released a 🚨 FREE SCIENTIFIC CALCULATOR APP 🚨 for ... (1) iOS - itunes.apple.com/us/app/desm… (2) Android - play.google.com/store/apps/d… (3) Kindle - amazon.com/dp/B07JXXCF25/ref… Get 'em!
Image from Desmos (@Desmos)
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The article is great!
Jo Boaler (@joboaler) profile pictureJo Boaler
@joboaler6 Oct 2018
What are students thinking about maths in the 2 activities in this film? Please share with any teachers still using timed tests. They are the beginning of maths anxiety for so many. The cool activity that is featured in the 2nd part of the film is in here: youcubed.org/evidence/fluenc…
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Telanna (@TAnnalet) profile picture
Telanna@TAnnalet3 Oct 2018
So...I found this just now and now I'm hooked. I gotta find time to play today!
Teachers of Maths (@ATMMathematics) profile pictureTeachers of Maths@ATMMathematics25 Sep 2018
Replying to @ATMMathematics
The task we'll be considering this Thursday - selected and presented by @mdawesmdawes - is taken from our Primary Points of Departure. atm.org.uk/Shop/Primary-Poin… … We invite you, if you can, to look at it before the chat. #beingmathematical
Image from Teachers of Maths (@ATMMathematics)
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It’s time for the #9PMRoutine. Have you checked for suspicious activity around your house? Leave an outdoor light on so that thieves can’t hide in the bushes #yyc
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Den Rattee retweeted
Telanna (@TAnnalet) profile picture
Telanna@TAnnalet26 Sep 2018
Measuring, counting, creating bar graphs and comparing quantities and length in @symackenzieBP and @benningerbp classroom in @BelParkCBE #cbemath
Image from Telanna (@TAnnalet)
Image from Telanna (@TAnnalet)
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Den Rattee retweeted
Dan Meyer (@ddmeyer) profile picture
Dan Meyer@ddmeyer25 Sep 2018
(1) Teachers should prepare with purpose for their lessons. (2) Students should understand the purpose of their work by the end of class. Neither of those goals requires posted objectives at the start of class. teapawt.org/JessicaTilli1/status/1…
Jess Tilli (@JessicaTilli1) profile pictureJess Tilli@JessicaTilli125 Sep 2018
If math is supposed to be discovery-based, what do my fellow math minds think about posted objectives? Do they take away from the opportunity for students to figure things out? @ddmeyer @gfletchy @robertkaplinsky @joboaler #mathchat #math
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Si on utilise les nombres de 1 à 10 et les 4 opérations mathématiques (+ une opération qui se répète) quelles équations donnent le résultats de 21,2,3,2 , 17? #vnps #buildingthinkingclassrooms @pgliljedahl @ArsenaultAmelie #collabcepeo
Image from Mme Martine (@BazinetMme)
Image from Mme Martine (@BazinetMme)
Image from Mme Martine (@BazinetMme)
Image from Mme Martine (@BazinetMme)
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An example of a question that we explored this week: how many dots are there, and how do you know?
Image from Mrs. Peyman (@MrsPeymanCBE)
Image from Mrs. Peyman (@MrsPeymanCBE)
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Today's quick dot image
Image from Simon Gregg (@Simon_Gregg)
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Taped up my white board today. All day geometry Ss used a protractor to measure and classify angles. Didn’t quite get them all!! #MTBoS #Geometry
Image from Nicholas Springer (@NSpringerMath)
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Is it better to solve problems in isolation or by collaborating with others? Harvard research says . . . neither. The best solutions come from "intermittent collaboration" -- group work punctuated by breaks to think & work by ourselves. news.harvard.edu/gazette/sto…
Collaborate on complex problems, but only intermittently

Collaborate on complex problems, but only intermittently

When solving problems, both groups in which members never interacted and groups whose members constantly interacted provided expected results. The surprising outcome came from groups whose members...

news.harvard.edu
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If you teach physics to 11 to 18 year olds then you absolutely need to get hold of a copy of Ben Rogers' superb new book "The big ideas in physics and how to teach them": bit.ly/2nou6PN. And that's not just my opinion. John Sweller describes it as "brilliant". Nuff said.
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This is the kind of dangerous, journalistic propaganda that undermines any efforts to humanize math education. Since when did the fringe become so emboldened to spread their limited understanding of mathematics? @d_martin05 @BurdessAlicia @evaferguson2 teapawt.org/SocialMediaRA/status/1…
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Have a hard time w self promotion (here goes!) but I do want to say that something is afoot w @TheGreatCourses Power of Visualization in Maths. Been receiving a spate of uplifting lovely emails about it. Thx! This, of course, is my take on how math can be. thegreatcoursesplus.com/show…
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Yes! teapawt.org/mathgarden/status/9997…
Sunil Singh (@Mathgarden) profile pictureSunil Singh@Mathgarden24 May 2018
The **holy trinity** of theories should be a staple in every K to 5 curriculum. Coloring, scheming, and patterning is right in the wheelhouse of every child. No kid ever got excited about mathematics by learning something like multiplying decimals or dividing fractions...
Image from Sunil Singh (@Mathgarden)
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"Memorizing rules in mathematics is like memorizing lines for a play in a language you don't understand " - @mathforlove #mcata #mathchat
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Play is the engine of learning!#mathforlove #mcata
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Practical strategies to improve facilitation of class discussions edutopia.org/article/bringin… #cbemath
Bringing All Students Into Discussions

Bringing All Students Into Discussions

Techniques for fostering meaningful class discussions by getting even reluctant students to share their insights.

edutopia.org
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