Math Links for Week Ending Aug. 30th, 2019

Featured Links

I think any time you can take an abstract concept and make it more visible, then it's a benefit for students. In this case the concept is exponential growth and Desmos has released a new activity to get kids talking about, what looks like, cell division. 

Curriculum Tags: MCR3U, MCF3M, MBF3C
https://teacher.desmos.com/activitybuilder/custom/5d56f89cd82b4905e2def1ac

👉🚨NEW ACTIVITY 🚨👈

"Circles" will help your students think about exponents!

⚪⚫🔴🔵🔴⚫⚪⚫🔴🔵https://t.co/qZLoOzwNra pic.twitter.com/XKQ69xN0ib

— Desmos.com (@Desmos) August 19, 2019

Resource Links

Some fun with infinite series.
Curriculum Tags: MCR3U
https://twitter.com/fermatslibrary/status/1166324490760065024

The infinite gift 🎁is an interesting object where the side of the nth box is 1/√n. As n→+∞, the gift has infinite surface area and length but finite volume! pic.twitter.com/Ckm2KHp1e7

— Fermat's Library (@fermatslibrary) August 27, 2019

Opinion Links

Some nice insights from @MarkChubb3 on the differences between some of the categories of the achievement chart here in Ontario.
Curriculum Tags: All
https://buildingmathematicians.wordpress.com/2019/08/21/the-types-of-questions-we-ask-which-categories-of-questions-should-we-focus-on/

Video Links

If you have some time to kill then you might try to replicate this
Curriculum Tags: All
https://twitter.com/Ayliean/status/1163208862587076608

Exactly 100 years before I was born David Hilbert first described the Hilbert Curve - so I used my birthday to draw the seventh iteration in homage 🤘📐 pic.twitter.com/keyaHMNmcp

— Ayliean (@Ayliean) August 18, 2019

A nice visualization of scaling a vector. Watch the video then play with the Geogebra file.
Curriculum Tags: MCV4U
https://twitter.com/dynamic_math/status/1163797833457291275

Scaling A #Vector: Dynamic & modifiable geometric illustrator. Created with @geogebra: https://t.co/wEmMQsOiXR. #MTBoS #ITeachMath #math #maths #physics #EdTech pic.twitter.com/mVWgBT2YfM

— Tim Brzezinski (@dynamic_math) August 20, 2019

This cube dissection is pretty cool. Especially the 3D printed version that @MikeandAllie made (see below) and it reminds me of these two constructions seen below as well.
Curriculum Tags: MPM1D, MFM1P, MFM2P
https://twitter.com/gregeganSF/status/1160801098594054145

This is my favourite dissection of the cube: 6 pieces, with the 6 ways of permuting the coordinates in ascending order:

x ≤ y ≤ z
x ≤ z ≤ y
y ≤ x ≤ z
y ≤ z ≤ x
z ≤ x ≤ y
z ≤ y ≤ x

In higher dimensions, the n-cube can be dissected in the same way into n! pieces. pic.twitter.com/RCrOOYUSC2

— Greg Egan (@gregeganSF) August 12, 2019

https://twitter.com/mikeandallie/status/1160951997731921920

We did this dissection as a fun 3D printing math project for kids a while back and @PaulaKrieg made some neat folded boxes to hold them pic.twitter.com/CtZmarmPlh

— Mike Lawler (@mikeandallie) August 12, 2019

https://www.youtube.com/watch?v=LU-WMwlWfX0

https://www.youtube.com/watch?v=d-C_-61pJcc

Image Links

What fractions do you see?
Curriculum Tags: Gr7, Gr8
https://twitter.com/crstn85/status/1163858895623905280

Fractions in the wild!

Is #FractionChat a thing? I know #UnitChat is. pic.twitter.com/kghQlP4w33

— Tina Cardone 🏳️‍🌈 (@crstn85) August 20, 2019

I wish I would have had this advice when I started as a math coach
Curriculum Tags: All
https://twitter.com/fawnpnguyen/status/1164926849190731777

Sucks for you if you didn’t get a text like this from a true friend on your first day on the job like I did. pic.twitter.com/GFcteywPTK

— Fawn Nguyen (@fawnpnguyen) August 23, 2019

Know your numbers
Curriculum Tags: All
https://twitter.com/centerofmath/status/1164882313567703040

In case you haven't been introduced to all of them yet...#FunFriday #DOMATH pic.twitter.com/LX8BiMQX5A

— Center of Math (@centerofmath) August 23, 2019