Den Rattee

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

[Den Rattee @DenRattee]

@MrsUnsworthWTT @aprilf4175 @gfletchy @hartmannd12 @JBayWilliams Thanks!

[James Tanton @jamestanton]

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]

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...

[Desmos @Desmos]

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[Den Rattee @DenRattee]

@d_martin05 The prince of mathematics

[Bel-Park School CBE @BelParkCBE]

The article is great!

[Telanna @TAnnalet]

So...I found this just now and now I'm hooked. I gotta find time to play today!

[Den Rattee @DenRattee]

@TAnnalet @symackenzieBP @benningerbp @BelParkCBE They blend together in 5/6 for sure: “make some rectangles using 24 square tiles and record the dimensions as a product” measurement or number?

[Den Rattee @DenRattee]

@TAnnalet @symackenzieBP @benningerbp @BelParkCBE Yep. Measurement as a context for number at the start. Then measurement concepts as models and context throughout the rest

[Calgary Police @CalgaryPolice]

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

[Telanna @TAnnalet]

Measuring, counting, creating bar graphs and comparing quantities and length in @symackenzieBP and @benningerbp classroom in @BelParkCBE #cbemath

[Den Rattee @DenRattee]

@paul_ivey @ddmeyer Total edubabble. Adding a posted learning intention and success criteria to a well-designed, engaging lesson improves the lesson’s effectiveness by epsilon

[Den Rattee @DenRattee]

@Mr_MMY @MathletePearce @ddmeyer Did that need to be stated? What was gained? What was lost?

[Dan Meyer @ddmeyer]

(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. https://t.co/dMCsiXjfYj

[Mme Martine @BazinetMme]

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

[Mrs. Peyman @MrsPeymanCBE]

An example of a question that we explored this week: how many dots are there, and how do you know?

[Simon Gregg @Simon_Gregg]

Today's quick dot image

[Nicholas Springer @NSpringerMath]

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