We've been doing a lot of work in terms of conceptualizing fraction operations. This is the latest video developed by Gisele Jobin and I and the purpose of these (longish) videos are to help show teachers ways to conceptualize fraction operations by using a progression of examples. In this case, the idea is that fraction division can be done without using the standard algorithm if you just get common denominators (and then it because relatively trivial). Follow the link below for the entire playlist.
Curriculum Tags: Gr8, Gr9
https://www.youtube.com/watch?v=IlJ1ZyAbSm0&list=PLre81yNdo4MzOC0ov1a5HDPaeBd7MpAEc
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Do you want some insight as to how Uber decides how to charge it's riders. Well @RobertKaplinski has some insight. He does it with some great and detailed discussion of mathematical modelling. But even if you don't want to do some in depth analysis of you can just use the formula to give some context for students to use formulas for real world problems to practice doing calculations with order of operations.Curriculum Tags: Gr7, Gr8, MCR3U, MHF4U
https://robertkaplinsky.com/math-modeling-can-tell-uber-much-charge/
I really love this "remix" by @ChrisHunter36 of the standard problem: "Determine an equation of a quadratic function with vertex at (-5, 3), passing through the point (-7, 15).". Turn it into a step by step set of clues and sprinkle some appropriate use of technology in there to make it much more engaging for students with the same result. Get the downloads including the Desmos activities and powerpoint.Curriculum Tags: MPM2D, MCF3M, MCR3U, MBF3C, MAP4C
https://reflectionsinthewhy.wordpress.com/2019/01/08/wanted-parabola/
Need a progression for developing the ideas around Pythagorean Theorem? Well then @MathyCathy has your back. Some good ideas here that go well beyond just the standard formula. Especially since it doesn't start with the formula.Curriculum Tags: Gr8, MPM1D, MFM1P
http://www.mathycathy.com/blog/2019/01/mathresourceroundup-pythagorean-theorem/
I like how this folksie song weaves in Andrew Wiles and Fermat's Last Theorem. Thanks to @jessrteach for pointing this one out.
Curriculum Tags: All
https://www.youtube.com/watch?v=ZPMRA4yFeeM
Seems like a simple problem but it does show the danger of trying to model with only two data points. Make sure you read the thread for the answer.
Curriculum Tags: MCR3U, MHF4U
https://twitter.com/ddmeyer/status/1089929444494458883
Modeling Monday!— Dan Meyer (@ddmeyer) January 28, 2019
How long will the last set of dominos take to fall?
Closest answer without going over gets free Desmos socks and some class gear. #iteachmath pic.twitter.com/3JAKgOChZD
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Here's a pretty cool idea to do with any online graphing calculator
Curriculum Tags: MCR3U, MHF4U
https://twitter.com/PaulaKrieg/status/1090771516256604160
My problem was to find & graph a family of functions in @desmos that I could frame within a square, & that was easily, visually divided into 3 column. I traced it into a vector file, colored it, so I could use it to make an origami rectangular tray. Here's how it went. #GraphJam pic.twitter.com/jzAgbYRiWP— Paula Beardell Krieg (@PaulaKrieg) January 31, 2019
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