Math Links for Week Ending Jul. 24th, 2020

Featured Links

I feel like in this forum, I am preaching to the converted. But just in case some of you still aren't making Twitter a part of your math repertoire, I would like to point out that there are pedagogical discussions that start with a simple prompt. Here are a couple. Make sure you look at the comments for the discussion. 

Curriculum Tags: All

https://twitter.com/DavidKButlerUoA/status/1285770606261047297

https://twitter.com/howie_hua/status/1285638446426599425

Here's a question I just thought of, that was interesting to me:

Must a line with positive slope pass through the first quadrant?

— David Butler (@DavidKButlerUoA) July 22, 2020 

What is your favorite math misconception to discuss with your students?

— Howie Hua (@howie_hua) July 21, 2020

Resource Links

Here's a great, fun activity from @Desmos on scale diagrams. 

Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P

https://twitter.com/Desmos/status/1284156533664657410

🎉🎉Free activity day is back!
In "Scaling Machines” students create a shape and use different “printers” to copy their shape, but some are broken! https://t.co/VuM0fC7xrB pic.twitter.com/aUnpSakr3w

— Desmos.com (@Desmos) July 17, 2020

Video Links

Holy moly I want a 3D printer more than ever. Such cool geometry going on here. 

Curriculum Tags: All

https://www.youtube.com/watch?v=jpbIlfeZno8

I like these "If the _____ was 100 people....." data representations. And this can be used for more than just data. I think it could be used for proportional reasoning and percents as well.  This one is a few years old but it's the first time I've seen it so, here you go. 

Curriculum Tags: MDM4U, Gr7, Gr8, MPM1D, MFM1P

https://www.youtube.com/watch?v=QFrqTFRy-LU

I like this "test" video on the force produced by different sized screws (he says power but he really means force). It's more of a physics video but I think you can do some math stuff with rates and slope too. And it could also be used in a STEM setting. Plus the fact that this guy has some serious manufacturing skills. 

Curriculum Tags: MPM1D, MFM1P

https://www.youtube.com/watch?v=rGv_UXhNORE

Image Links

There are so many instances of bad data online about C-19 but to have an example right out of "How to Lie with Statistics" pushed out from an official state office, that's worth a conversation. 

Curriculum Tags: MDM4U

https://twitter.com/andishehnouraee/status/1284237474831761408

In just 15 days the total number of #COVID19 cases in Georgia is up 49%, but you wouldn’t know it from looking at the state’s data visualization map of cases. The first map is July 2. The second is today. Do you see a 50% case increase? Can you spot how they’re hiding it? 1/ pic.twitter.com/wAgFRmtrPk

— Georgia Person (@andishehnouraee) July 17, 2020

This was from last week's #MathPhoto20 theme of #measure

Curriculum Tags: All

https://twitter.com/davidpetro314/status/1285922036888539137

Was walking by the post office in my town the other day and saw this survey marker and thought it would be good for both the #circles and #measure themes of #mathphoto20#mathchat #mtbos #iteachmath pic.twitter.com/QNnGy9NJVr

— David Petro (@davidpetro314) July 22, 2020