Math Links for Week Ending Jul. 26th, 2019

Featured Links
If you haven't purchased your #mathgals shirt (or even if you have) then you may be interested on who the women are on each shirt. Thanks to @SamJShah2 for pointing this out.
Curriculum Tags: All
https://twitter.com/samjshah2/status/1153131349458505729

For those who need a reminder or want to know who each fabulous person is on the #mathgals tshirts, here are two threads from @MrsNewell22 that has everything you need:

1) Original shirt: https://t.co/bkK5tvcVWY

2) Second shirt: https://t.co/WI01IqVKOT

Huzzah! #MTBoS

— samjshah2 (@samjshah2) July 22, 2019

Resource Links
I'm a big fan of card sorts and so here is a nice and simple Desmos Card sort for special quadrilaterals from @Giohio
Curriculum Tags: Gr7, Gr8
https://teacher.desmos.com/activitybuilder/custom/5d39d1334d9d49026d198d11

Created this Special Quadrilaterals @Desmos Card Sort if any #Geometry teachers are interested. https://t.co/tvvL5b7u4s

Anything that should be added or deleted? pic.twitter.com/94gkyo5Xmk

— Steve Phelps (@giohio) July 25, 2019

It turns out some of the math that got us to the moon is use to help the logistics of why most planes land on time.
Curriculum Tags: All
https://www.cnn.com/2019/07/24/world/apollo-moon-math-airplanes-scn-trnd/index.html



This is pretty cool. The idea is that you give students a context for a graph and then ask them to draw what they think the graph will look like before showing them. This TheyDrawIt! authoring tool lets you create the situations. Give it a go
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U, MAP4U
https://medium.com/multiple-views-visualization-research-explained/theydrawit-an-authoring-tool-for-belief-driven-visualization-b3267a001480

Some number facts up to 10^googol (and beyond) in two blog posts. Thanks to @YaBoiMack for these two.
Curriculum Tags: All
https://waitbutwhy.com/2014/11/from-1-to-1000000.html
https://waitbutwhy.com/2014/11/1000000-grahams-number.html


Opinion Links
I have always liked the work of @taylorpeter77 and so I am quite interested to see what comes of this curriculum that he is developing that focusses on creativity and wonder in mathematics. Read about it here.
Curriculum Tags: All
https://phys.org/news/2019-07-mathematics-creativity-fun.html


Video Links
Who doesn't love 3D interactive mathematical art?
Curriculum Tags: All
https://twitter.com/creapills/status/1147163440399757312

"Un cercle est un carré, un carré est un cercle"

Crédits : Troika (https://t.co/HNIaxrQU1B) pic.twitter.com/5vWyCn4FOK

— Creapills 💊 (@creapills) July 5, 2019

Image Links
Some nice data about Internet usage around the world
Curriculum Tags: Gr7, Gr8
https://twitter.com/simongerman600/status/1153834938799710209

Share of the global population that uses the internet. Remember that babies and really old folks use the internet and some folks might just be to poor or extreme hippies.

Visual Source: https://t.co/cg4bkoTZx1
Data Source: https://t.co/CaFxEPHIyQ pic.twitter.com/b8T8JkkE47

— Simon Kuestenmacher (@simongerman600) July 24, 2019

Math Links for Week Ending Jul. 19th, 2019

Featured Links

Who knew there was such a thing as a golygon? I'm sure you could have students do so much with this sort of thing. Making their own, investigating things like area and perimeter. That sort of thing.
Curriculum Tags: Gr7, Gr8
https://twitter.com/fermatslibrary/status/1151834005756698624

A golygon is any polygon with all right angles whose sides are consecutive integer lengths. pic.twitter.com/zrxn1JkrLy

— Fermat's Library (@fermatslibrary) July 18, 2019

Resource Links

Last week I had a link to a recent Trump Campaign survey about the Democrats and how it was so biased. It turns out that this is pretty normal (maybe that is not surprising). Here is one on the media that starts out almost normal but then it quickly makes a turn. Thanks to @Esping_Math for this one.
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U, MAP4C
https://www.donaldjtrump.com/landing/mainstream-media-accountability-survey

When you introduce trig ratios, it's important for kids to practice. This way they get comfortable with what they mean and how to use the. This open middle activity from @And02B has been updated by  @mathequalslove and is a nice way for them to do that. The activity isn't new but what she did was make it physical with printable cards. You might want to change some of the cards if you want to keep to the primary trig ratios but it still has a lot of potential. Check out the link for all the downloads.
Curriculum Tags: MPM2D, MFM2P, MCR3U, MCF3M, MBF3C.
https://mathequalslove.blogspot.com/2019/06/trig-ratio-open-middle-task-with.html

Video Links

That is totally fun? How do you think a student would describe what was happening?
Curriculum Tags: All
https://twitter.com/Gelada/status/1150482149004517377

Careful it doesn’t eat you! A phyllotaxis spiral opens up! #mathart #mathgif #generative pic.twitter.com/uwAC8t8GeD

— Edmund Harriss (@Gelada) July 14, 2019

Image Links

I don't think there is any age that it's not appropriate to ask "How many....?" "How did you count them?". Being comfortable with numbers is the first step in being numerate.
Curriculum Tags: All
https://twitter.com/Simon_Gregg/status/1151822603683803136

How many holes? How do you count them? pic.twitter.com/1FdpdCUlCV

— Simon Gregg (@Simon_Gregg) July 18, 2019

Math Links for Week Ending Jul. 12th, 2019

Featured Links
Who is the world's most interesting mathematician? That's what the Great Internet Math Off is trying to find out. Go to the link below to find out who is up for matches this year (and vote as well). Two people who frequently appear on this blog are @SamJShah2 and @MathGarden. Look for their matches and vote for them too.
Curriculum Tags: All
https://aperiodical.com/2019/06/announcing-the-big-internet-math-off-2019/

Resource Links
I like this Open Middle problem from @MrJohnRowe on Areas
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://twitter.com/MrJohnRowe/status/1148107154076782593

Here's an @openmiddle problem I created while on the flight to #AAMT2019#iTeachMath #MTBoS @aamtinc 🦘 #MTBOz pic.twitter.com/6rVH5dbUlp

— John Rowe 👨🏽‍🚀 (@MrJohnRowe) July 8, 2019

This is crazy that it's real. It's the Official Trump Vs Democrats poll. It's the perfect example of how to write biased questions. And the poll is still up so you know it's on purpose. You could certainly have a great discussion with any data management students. But just in case they actually look at the validity of the poll and take it down, @Abel_Jennifer has taken screen shots of the whole thing so you will always have it.
Curriculum Tags: Gr7, Gr8, MDM4U, MAP4C
https://www.donaldjtrump.com/landing/2020-trump-vs-dem-poll

Are you looking for your next math shirt? Here's one started by @BerkleyEverett to help remind students that they are not bad at math.
Curriculum Tags: All
https://twitter.com/BerkeleyEverett/status/1149756485091512321

Yes!! This is the first picture of #MathPositive I'm seeing. Thank you Krista for sharing!

Here's the link for anyone interested in their own shirt. https://t.co/DirjyG7ZUk

Proceeds go to raffling off math ed books on twitter :) #mtbos #iteachmath https://t.co/xrOvtZytUQ

— Berkeley Everett (@BerkeleyEverett) July 12, 2019

Video Links
Here's a great "real world" problem that could be connected to estimation or even volume of rectangular prisms
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://twitter.com/ddmeyer/status/1148370640119857152

😡 Pretty sure I'm getting ripped off.

I know how many bricks they charged me for but this is what showed up!

1️⃣ What's your guess at the number of bricks here?
2️⃣ What's the fastest way for me to count them up? One by one?#3actmath #iteachmath pic.twitter.com/nW6C8L0TNP

— Dan Meyer (@ddmeyer) July 8, 2019

What a great way to make fractions auditory.
Curriculum Tags: Gr7, Gr8
https://twitter.com/MathsXer/status/1149167080786104320

Ok #mtbos #mtboz I just delivered a workshop in a music room so I thought I'd make a little video of what the fraction wall SOUNDS like. Hope you enjoy. Apologies for the poor technique and flat bongos. #whymaths #AAMTConf19 #AAMT2019 pic.twitter.com/qf8onzVerm

— Shyam Drury (@MathsXer) July 11, 2019

Image Links
Great visual puzzle
Curriculum Tags: All
https://twitter.com/jamestanton/status/1149895725251092480

A wordless self-replication puzzle. (Though someone will no doubt point out to me that I just used words!) As per usual: 1. What do you think the puzzle is? 2. What is your response? pic.twitter.com/iZuaPPRIcP

— James Tanton (@jamestanton) July 13, 2019

Here is a nice graphic organizer for quadrilaterals
Curriculum Tags: Gr7 Gr8
https://www.instagram.com/p/Bu7B2nihte2/?utm_source=ig_web_button_share_sheet

View this post on Instagram

Anyone else STRUGGLING with classifying quadrilaterals? 🙋🏼‍♀️ Please don’t tell me I’m the only one! 🙈 But seriously, this poster has been a GREAT way to help my kids see how shapes can fit into more than 1 category. Hopefully with a few more days of practice we’ll last those pesky squares, rectangles, and rhombi... 🤞🏼 . . . #iteachmath #iteachthird #iteach345 #quadrilaterals #iteachtoo #teachersofinstagram #teachergram #teacherpreneur #teachersfollowteachers #instateachers #teacherspayteachers

A post shared by C A S S I E W I L K E R S O N (@mathandmorein104) on Mar 12, 2019 at 1:51pm PDT

Math Links for Week Ending July 5th, 2019

Featured Links

Being able to estimate is a great skill for students to have. And so why not estimate angles and distances in a fun way. In this activity @sergeballif does an awesome job of it with Degree Golf. Students start on hole one and estimate the angle to shoot and the distance to the hole. The number of shots is kept track of and then once they do all the holes, there is a Challenge creator for students to create their own hole for the rest of the class to try.

Curriculum Tags: Gr7, Gr8

https://teacher.desmos.com/activitybuilder/custom/5d0f18db353b1a59cc6dfdb9

Resource Links

If you like Pi and Python coding then you might like this blog post about mixing those things. The code is there and the different types of Pi calculations. And it has one of my favourite infinite series methods. So have some fun. Thanks to @yaboimackp for this one.
Curriculum Tags: MCR3U

http://www.experimentswithtruth.xyz/calculating-pi-recursively-love-letters-to-pi/

I really like this assessment idea from @a_mcsquared. The premiss is this (I am simplifying): You give an assignment and the day before it is due you make the answers with full solutions available and then ask students to grade their own assignments. Who hasn't given out an assignment (or test), posted full solutions after grading to see very few kids actually look at them. In this case, having students do the grading themselves will likely give them better insight into what went wrong because they have done the work. Check out the full explanation here.
Curriculum Tags: All
http://audrey-mcsquared.blogspot.com/2019/06/changing-follow-up-into-rise-up.html

And speaking more on assessment, @BCphysics did a little experiment where they posted a series of marks and asked people to holistically and more formally determine a grade. What were the results? That in most cases, the holistic grade was just fine. I would go even further to say that the idea that we can somehow calculate any grade and be confident of it's accuracy is a fallacy. That is, if you calculate a grade of 83.25% (because you can), I would argue that that precision is misleading. In fact, I would argue that you are probably only confident to +/- 5%. Read more here.
Curriculum Tags: All
http://physicsoflearning.com/edblog/holistic-vs-calculated-grading/


Opinion Links

In this post @MathGarden talks about the idea that math is not about getting the answer. In fact, he says: "That mathematics is only worth doing if you can be correct. That mathematics can only be appreciated by being proficient. That mathematical expertise is obtainable in this narrow definition of mathematics. All of this is false." Read more at the link below. Thanks to @KMarkPet for this one.
Curriculum Tags: All
https://medium.com/@sunilsingh_42118/mathematics-in-the-age-of-brene-brown-6f0bc4a179c2

Video Links

I thought this video on the Fourier Series from @3blue1brown was awesome. It does get into the weeds a bit but the visuals are great for talking about adding vectors, adding functions, limits, calculus, transformations and more high end stuff. It's a bit long but I think it would be cool to have students watch it and talk about all the parts that relate to the math they are doing. And honestly, I love that a 25 min long video on Fourier series can get over 600k views in a few days.
Curriculum Tags: MHF4U, MCV4U
https://www.youtube.com/watch?v=r6sGWTCMz2k

And for a slightly simpler version, you might like this one from @smartereveryday
Curriculum Tags: MHF4U, MCV4U
https://www.youtube.com/watch?v=ds0cmAV-Yek

Image Links

who doesn't like fun with an Apollonian gasket where the numbers show 1/r, where r is a given circle’s radius.
Curriculum Tags: Gr 8
https://www.americanscientist.org/article/a-tisket-a-tasket-an-apollonian-gasket