Math Links for Week Ending Oct. 25th, 2019

Featured Links
There are some cool features in this new @Desmos activity. First of all it's a great activity for connecting rates and linear relations as well as introduction to systems of equations. The context of racing turtles is fairly benign but I love the feature on slide 7 where students can draw the distance time graph (either with straight segments or by hand and then race them to see the results. Definitely great to bring discussion into your classes.
Curriculum Tags: MPM1D, MFM1P, MFM2P
https://teacher.desmos.com/activitybuilder/custom/5da9e2174769ea65a6413c93

Resource Links
Last week I posted about how the Autograph graphing software is now free. And got this neat activity Tweeted back to me on the value of e.
Curriculum Tags: MHF4U, MCR3U
https://twitter.com/douglasbutler1/status/1186621842062299136

David Petro, Toronto
Good to hear that you have discovered Autograph.
Here is a classic Autograph lesson exploring 'e',. and
please note this link to loads of videos and other resources:https://t.co/GAuXlHjCzt pic.twitter.com/V5HqfjYR3e

— Douglas Butler (@douglasbutler1) October 22, 2019

Here is a glimpse of the formation of a Desmos activity from @JennSWhite with some nice interactive features to help teach the concept of angle relationships with a transversal through parallel lines.
Curriculum Tags: Gr8, MPM1D, MFM1P
https://teacher.desmos.com/activitybuilder/custom/5db0822dbab1750b32779f08




Article Links
Some inspiration for your female students. Gladys helped develop GPS
Curriculum Tags: All
https://www.upworthy.com/you-may-not-know-gladys-west-but-her-calculations-revolutionized-navigation



Video/Audio Links
I love this video from @3Blue1Brown. Even if you are not interested in polar coordinates, I think it's still interesting because of how he shows the mathematics of why a pattern exists for prime numbers (spoiler alert, it's just a subset of all numbers). And the visual effects are pretty awesome too.
Curriculum Tags: All
https://www.youtube.com/watch?v=EK32jo7i5LQ

I think this is easier to make than hexaflexagons. So take a shot at creating a tetraflexagon.
Curriculum Tags: All
https://www.youtube.com/watch?v=7H4lDi79YY8

I recorded an episode on the @MakeMathMoments podcast in the summer and it went live this week. It's about the benefits of sharing on the Internet. Have a listen
Curriculum Tags: All
https://twitter.com/MakeMathMoments/status/1186352273418571783

[NEW EPISODE 47] In this episode we chat with @davidpetro314 about resource sharing, online learning, what his favorite activities are, and how you can get started!

Dive in: https://t.co/9tc3JRdX5r#mathchat #mathschat #MTBoS #edchat #iteachmath pic.twitter.com/qbQMQjQFDf

— Make Math Moments That Matter (@MakeMathMoments) October 21, 2019

Here's a possible way to help students distinguish between perimeter and area
Curriculum Tags: Gr7, Gr8, MFM1P
https://twitter.com/PaulaKrieg/status/1186730489748623361

Ss learn perimeter & area at around the same time, then sometimes get them mixed up. I just finished a perimeter-pocket that holds a string and even has a ruler printed on it, designed to help Ss remember what is perimeter. Part of my workshop at @center4bookarts this Saturday. pic.twitter.com/jKVULp2G8Q

— Paula Beardell Krieg (@PaulaKrieg) October 22, 2019

Image Links
I added to my collection of pictures of tessellations
Curriculum Tags: Gr7
https://www.instagram.com/p/B33C_79nay4

View this post on Instagram

Tonight’s #tessellation

A post shared by David Petro (@lookimyourfather) on Oct 20, 2019 at 5:27pm PDT

Math Links for Week Ending Oct. 18th, 2019

Featured Links
Sometimes when things are free, you get what you pay for. But other times, like this one, a super powerful software package that had a price tag, has become free. In this case that is the Autograph dynamic math package. I have always liked this but because there was a cost, I never bothered with it since we already had things like Desmos and Geogebra (and here in Ontario, Geometer's Sketchpad) available for free to teachers and students. So now everyone can try Autograph out.
Curriculum Tags: All
https://completemaths.com/autograph

You can download Autograph for free from the Complete Maths websitehttps://t.co/ADXgnh2V2S

This initial launch brings PC and Mac (depends on OS) desktop versions.

Soon, we will add a new Mac version and a web application version for mobile devices.

— Autograph Maths (@autographmaths) October 12, 2019

Resource Links
A new @Desmos activity to investigate angle relationships
Curriculum Tags: Gr8, MPM1D, MFM1P
https://teacher.desmos.com/activitybuilder/custom/5d896650e796e00c23556d76

💥💥💥Brand new activity from the @Desmos Team: Puzzling it out ! Students solve angle puzzles to apply what they’ve learned about angle relationships and to informally learn the Triangle Sum theorem #desmos #MTBoS #iteachmath https://t.co/L2XiAPCI0S pic.twitter.com/VW5DLErOYd

— Jocelyn (Joce) Dagenais (@jocedage) October 11, 2019

Make sure you read through the comments to see all the ways mathematical vocabulary can hang up students.
Curriculum Tags: All
https://twitter.com/bstockus/status/1183773482460553217

Vocabulary is a roadblock for students who struggle with mathematics, and for many reasons:

— Brian Bushart (@bstockus) October 14, 2019

I always like to promote new books coming out by the math teachers in the Twitter world and this time it's @robertkaplinsky who has an @OpenMiddle book coming out at the end of the month. And right now, if you preorder, there is a discount.
Curriculum Tags:All
https://twitter.com/robertkaplinsky/status/1184955244175749121

Hey @openmiddle fans. My book comes out in 11 days and the 10% off coupon (OPEN10) expires on 10/28. So if you were considering checking it out, head over to https://t.co/7tvRm4TVIa. If you want to learn more about it, read this blog post: https://t.co/RCm64ACjWn #OpenMiddleBook pic.twitter.com/ZRIqElbyes

— Robert Kaplinsky (@robertkaplinsky) October 17, 2019

Opinion Links
From a session lead by @AlexOverwijk, a good sentiment for any school or department:
Curriculum Tags: All
https://twitter.com/aledaklassen/status/1185016447141142528

Thanks, @AlexOverwijk, for making explicit what I have felt for a while:

Teachers can make more of an impact when they work together and believe they can positively affect learning and effect change. #collectiveteacherefficacy #teamteaching #wrdsbmathhttps://t.co/Wn3VZHFkJM

— Aleda Klassen (@aledaklassen) October 18, 2019

Video/Audio Links
Some awesome addition of vectors applications here. Definitely a surprising result but it really shouldn't be if physics works the way it's supposed to
Curriculum Tags: MCV4U
https://www.youtube.com/watch?v=M4-L8UgPkOk

I have started the second season of the @OAMEtalks podcast (everyone has a podcast now, right?). This month we previewed the webinar from @jboninducharme
Curriculum Tags: All
https://talks.oame.on.ca/season-2

Image Links
Though this is science related, I think the sentiment of persistence and hard work are the order of the day with this post of a Nobel Prize winner's rejection letter of her research from Nature. Something for our students to see.
Curriculum Tags: All
https://twitter.com/pipcosper/status/1182799512621977600

This is the rejection letter for the work that just won the Nobel Prize. Don’t stop believing!
I should save all of mine and maybe one day some stranger will think it’s an amazing relic and tweet it... pic.twitter.com/JuJHkLkXnw

— Pippa Cosper MD, PhD (@pipcosper) October 11, 2019

Math Links for Week Ending Oct. 11th, 2019

Featured Links
Hey, it's Global Math Week. That means it's time to get your kids to explode some dots. You still have time to get your class hooked up. The great thing about exploding dots is that it is appropriate all age groups. It's got a low floor and the math can go way into grade 12 polynomials. Check out the intro video from @JamesTanton and then sign up your class at the Exploding Dots website below.
Curriculum Tags: All
https://www.explodingdots.org/

Resources Links
Wholly moly, when I agreed to be part of the Making Math Moments Virtual Summit, I didn't realize the calibre of the speakers that I would be aligned with. Check out the speaking list and reserve your spot for next month's virtual conference.
Curriculum Tags: All
https://makemathmoments.com/summit/



And for some more virtual talks on Fractions, check out this list.
Curriculum Tags: Gr7, Gr8
https://mailchi.mp/cbecfc374a43/jll38bi0dt-2671469?e=[UNIQID]

In this week's article, we get to look at Fractions #onhere and how they are discussed or used inside and outside the #MTBoS. https://t.co/GPWL62eXfV

S/O to #MTBoSers@AsymptoticLiz @DingleTeach @BerkeleyEverett @gfletchy

— Lauren Baucom (@LBmathemagician) October 9, 2019

Here's a nice resource from @HTheijsmeijer where she collected and organized a pile of grade 9 EQAO questions by strand
Curriculum Tags: MFM1P, MPM1D
https://twitter.com/HTheijsmeijer/status/1180477995640864770

Released this week - a curation of released grade 9 EQAO questions by strand and curriculum expectation (academic & applied). https://t.co/Cx45lqCX26 #MTBoS #iteachmath #icoachmath #onted #mathchatont

— Heather Theijsmeijer (@HTheijsmeijer) October 5, 2019

Here's a great idea when dealing with radian measure
Curriculum Tags: MHF4U
https://twitter.com/mathhombre/status/1181917244416114688

Probably my favorite data of the year. Birthdays in radians. pic.twitter.com/IoB1W6vkdM

— John Golden 🔗 (@mathhombre) October 9, 2019

And check out the connection of the above Tweet to @BenOrlin's recent post
Curriculum Tags: MHF4U
https://mathwithbaddrawings.com/2019/10/09/whats-the-radius-of-a-day/

Opinion Links
As someone who has provided PD for teachers for many years I totally know that sometimes that PD falls flat. And everyone has an opinion on what PD they don't like but often don't have ideas about how to make it better. In this post @MarkChubb3 has some insight about what good PD could look like.
Curriculum Tags: All
https://buildingmathematicians.wordpress.com/2017/03/26/professional-development-what-should-it-look-like/

Video Links
This is an older post but it's the first time I saw this video from @Buzzmath. Cool stuff for dealing with collecting like terms and solving equations. Check out the link for other resources from @RobertKaplinsky
Curriculum Tags: MPM1D, MFM1P
http://robertkaplinsky.com/work/what-does-2000-calories-look-like/


Image Links
What a great way to help kids (really, all humans) really get a sense of how big a billion is.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://twitter.com/MikeFlynn55/status/1182095626193920000

This kind of math floors me. Just when I think I have a sense of the magnitude of 1 billion, something like this comes along and blows me away. pic.twitter.com/m7hJmSPjrM

— Mike Flynn (@MikeFlynn55) October 10, 2019

Math Links for Week Ending Oct 4th, 2019

Featured Links

In the latest episode of @Freakonomics Radio, they take on Math Education in America. They are not looking at the methods of teaching, however. They are looking at what is actually being taught and "spoiler altert" their data shows we should dump calculus and focus on data literacy. I definitely agree. Don't get me wrong, I love teaching calculus but very few people actually need it. There were a couple of bits that I liked, one was about the difference between what college professors wanted from students compared to what high school teachers thought they needed for college and how different those things were and the other was the survey results on who used which parts of math.

Curriculum Tags: All
http://freakonomics.com/podcast/math-curriculum/

Resource Links
Though in Ontario, there is no math course that teaches scientific notation directly, it is taught in the science courses. Here is a quick little @Desmos activity to help with that process. There are some nice animations and sorts to help students represent large and small numbers.
Curriculum Tags: All
https://blog.desmos.com/articles/new-scientific-notation-activity/


Here is a short and sweet dynamic tool to use when teaching the unit circle.
Curriculum Tags: MCR3U, MCF3M, MHF4U
https://twitter.com/von_Oy/status/1179509317629829121

Just something small here. A @Desmos unit circle for all those of you who are teaching trig this year.

And yes...the point *is* draggable around the circle.https://t.co/1smXYDDLyz pic.twitter.com/lCNjnlFWcg

— Suzanne von Oy (@von_Oy) October 2, 2019

For those of you who like to create your own @Desmos activities, they have just added the ability for students to upload photos into graphs while in Activity Builder.
Curriculum Tags: All
https://twitter.com/Desmos/status/1178718901351469056

New feature alert –

– students can now upload images in graphs in activities –

💣🤯🧹

All of you folks who assign graph art projects ... this is what you've been asking for.

— Desmos.com (@Desmos) September 30, 2019

Video Links
I love these videos of this YouTuber who does tool and mold making videos. So much practical geometry to show kids that there are applications to a lot of the stuff we do. In the first video he walks through the method to determine the centre of radius for a complicated shape but my favourite part was adjustable parallel tool (at about 8 min in) that he used in the second video where he is actually marking a cylinder in order to cut it into a hexagonal prism. The video is about how you could do such a thing if you didn't have a special "indexing" tool to do so.
Curriculum Tags: MCR3U, MBF3C, MCF3M, MCT4C, MAP4C
https://www.youtube.com/watch?v=ro1I03ktSa4
https://www.youtube.com/watch?v=_qYdcolOhGQ

It's cool to see all the math that goes into this Desmos graph to make the "caterpillar" springy. Great for any class dealing with complex functions to look at
Curriculum Tags: MCR3U, MHF4U
https://twitter.com/SumDumThum/status/1178917272733155329

Made an adorable stretchy caterpillar today: https://t.co/hsEhMLWmme pic.twitter.com/qLa21YK8ep

— Andrew Osborne (@SumDumThum) October 1, 2019

Image Links
I love that Canada is number one here. What questions come to mind with this infographic
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
https://twitter.com/joe_sisco/status/1180199831421235205

Nice graphic. @davidpetro314 @MathletePearce pic.twitter.com/mDEIxyXMNE

— Joe Sisco (@joe_sisco) October 4, 2019