Friday, October 13, 2017

Math Links for Week Ending Oct. 13th, 2017

Are you looking for some ideas for games to use in class? Well @jroulbach has you covered. Most of them have been around for a while in other blog posts but she's done a great job of putting them all together in one post. Trashketball, Row Games (here's my own set), speed dating and many more with templates and examples. Check them all out.
Curriculum Tags: All
https://ispeakmath.org/2017/10/10/my-favorite-math-games/
If you are looking for some interesting resources using ancient mathematics then check @jcrabtree's site of ideas and interactives.
Curriculum Tags: All
http://www.jonathancrabtree.com/mathematics/




There is a new blog out called QED that is bringing together mathematical minds from all over the place to talk about teaching math in the 21st century in a progressive way or ways that might challenge the status quo. In some cases they are cross posts from individual blogs and in others they are new posts just for the site. The site was kickstarted by @fjmubeen and @mathgarden but there are many more contributors than that. Check it out
Curriculum Tags:All
https://medium.com/q-e-d

I really like the idea of gradeless classes where all the learning comes about via from teacher-student dialogue and the grade comes from a collaborative effort between students and teachers. Here @MsHLye is starting to talk about here journey into this idea via a TLLP grant that she was awarded. So follow along with her and see if you can pick up some tips on going gradeless in your own class.
Curriculum Tags: All
http://teachinginspirations.blogspot.ca/2017/09/week-23-in-gradeless-math-self-peer.html


The idea of a math coach is not new but I remember feeling a bit odd when I started calling myself that in 2009 when I started my journey as one. But I quickly found that the idea of co planning, co teaching and debriefing with individual teachers was some of the best ways to get teachers to adopt new ideas. In this post @MarkChubb3 does a great job of breaking it all down when adopting the math coach model.
Curriculum Tags: All
https://buildingmathematicians.wordpress.com/2017/09/28/co-teaching-in-math-class/

This may seem a bit frivolous to complain about the accuracy of a street sign but here @standupmaths does a great job. He even manages to bring up Euler's identity for vertices along the way.
Curriculum Tags: Gr8
https://www.youtube.com/watch?v=btPqKAGyajM

You had me at Fibonacci. In this @numberphile video we see the connection between Fibonacci numbers and fractals. 
Curriculum Tags: All

A couple of new ones from @jstevens009 at Would you Rather Math
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
http://www.wouldyourathermath.com/hotels/

Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
http://www.wouldyourathermath.com/would-you-rather-66/


Saturday, October 7, 2017

Math Links for Week Ending Oct. 6th, 2017

I have added a new page to this blog. I called it Notable Links. It compiles many of the teacher generated sites (Estimation 180, WODB etc) as well as many teacher blogs where they often share resources. It's by no means a complete list and I am sure I will miss some but I wanted to have a running list of the best stuff somewhere (if only for me)
Curriculum Tags: All
http://ontariomath.blogspot.ca/p/notable-links.html

A few Desmos activities. This first one is a very cool calculus activity originally from @sergeballif but edited by @nemoyatpeace. Here students first start to estimate the value of the slope of the tangent of a function at a point and they get points for how close they are to the actual value and then it turns into a tutorial on the mean value theorem. Nicely done.
Curriculum Tags: MCV4U
https://teacher.desmos.com/activitybuilder/custom/59b9034cd89ded07ddf04552

I also like this one from @klockmath on conversion to and from mixed to improper fractions. It's very dynamic and has some neat coding in the background to make it work. Well done. Thanks to @Jstevens009 for pointing this one out
Curriculum Tags: Gr7, Gr8
https://teacher.desmos.com/activitybuilder/custom/59cc4518f54ea23b05c24a85

Then, after creeping @Klockmath's Twitter feed I also found this gem for introducing fractions conceptually. Some great tools here to understand fractions on this one.
Curriculum Tags: Gr7, Gr8
https://teacher.desmos.com/activitybuilder/custom/59c06a9eea1a8c0add5a0472


In this post @msbjacobs does a great job analyzing student work under the guise of interesting methods to solve the same solutions. In this case the catalyst was some student work from a student new to our country.
Curriculum Tags:All
http://themathguy.blogspot.ca/2017/09/more-than-one-way-to-crack-egg.html


If you haven't heard, this coming week is Global Math Week. The goal is to get over 1 million students engaging in joyous math. In this case, it is through the activity called Exploding dots (https://www.explodingdots.org/). It's a cool activity that starts with what looks like code breaking and the payoff is that the math can take you from elementary all the way to polynomials in grade 12. You can watch the intro video below or click on the link below from @mathletepearce for a nice summary and register your class to participate.
Curriculum Tags: All
https://tapintoteenminds.com/exploding-dots/


Are spinners still a thing? If they are in your class and you are teaching linear, quadratic or trig functions then you might like these resources from @harrytomalley. Follow the link for all the handouts. Thanks to @jocedage for pointing this one out.
Curriculum Tags: MPM1D, MFM1P, MPM2D, MFM2P
http://www.harryomalley.com/spinnermath/

Any time you can intrigue students with an image or video that makes them think then I think it's a good thing. So start with this image of a large Snicker bar and go to town. In this case @YummyMath has your resources around this image at the link below.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://www.yummymath.com/2017/big-snickers-bar/


Friday, September 29, 2017

Math Links for Week Ending Sept. 29th, 2017

To introduce the concept of mixed radicals, rather than just tell students, you might consider this short card sort. Students are give several cards to sort into groups that are equal in value but different in form. You can do this as a physical card sort or if you have the tech, you might use the Desmos cards sort version.
Curriculum Tags: MCR3U
http://engaging-math.blogspot.ca/2017/09/mixed-radical-card-sort.html

From the creator of visualpatterns.org, @fawnpnguyen,  comes a new site between2numbers.com. On this site you are given pairs of images and asked to compare them somehow. Proportional reasoning skills are the main idea here and eventually she expects to have enough so you could do one per week.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P, MAT1L, MAT2L
http://fawnnguyen.com/between-2-numbers/

I like simple activities and this integer bingo is a perfect example of one from @vaslona. Students are given a 4x4 bingo card (either generated or made on their own) then pingpong balls are drawn and added together to fill the card.
Curriculum Tags: Gr7, Gr8
https://logsandreflections.wordpress.com/2017/09/09/integer-bingo/




We are all bad at probability. In this article @fivethirtyeight goes over what the media often gets wrong.
Curriculum Tags: MDM4U
https://fivethirtyeight.com/features/the-media-has-a-probability-problem/

Some fun with doubling, halving and factoring from John Oliver via @ChrisHunter36. Check the post out for more details on using this in class.
Curriculum Tags: Gr7, Gr8
https://reflectionsinthewhy.wordpress.com/2017/09/11/halving-doubling-very-fun-to-play-with/



A brief history of banned numbers. Who knew?
Curriculum Tags: All
https://ed.ted.com/lessons/a-brief-history-of-banned-numbers-alessandra-king


A new one from @Jstevens009 on Would you Rather
Curriculum Tags: MCF3M, MBF3C, MCR3U
http://www.wouldyourathermath.com/would-you-rather-65/

Here's a neat little problem to practice problem solving in the context of rectangles.
Curriculum Tags: Gr7
https://fivethirtyeight.com/features/how-do-you-like-these-rectangles/

Now that's a cheat sheet and a reminder of why units are important.
Curriculum Tags: All
https://www.today.com/news/college-student-s-giant-cheat-sheet-allowed-professor-t116623



Ok some of these are funny. Check them all out below. Thanks to @saravdwerf for this one
Curriculum tags: All
https://www.buzzfeed.com/sarahaspler/people-our-math-textbooks-warned-us-about?utm_term=.fhVOGJKGQ#.od2rWZnWP


Friday, September 22, 2017

Math Links for Week Ending Sept. 22nd, 2017

Woo hoo, I saw a draft version of this at Twitter Math Camp this year and it seems that it is finally out. Transformation golf is a great way for kids to practice rotations, translations and reflections in a nice dynamic way. I've done a bit of work in this area here and here but the Desmos stuff is so slick your kids will love it.
Curriculum Tags: Gr7, Gr8
http://blog.desmos.com/post/165555417467/free-new-desmos-activity-transformation-golf

In Ontario, we call them learning goals. Here @mathycathy calls them learning targets. Regardless of the name,  if you have your students keep track of their progress on their learning goals then you might like the way that she has co opted Desmos Activity Builder to do that. Take a look
Curriculum Tags: All
http://www.mathycathy.com/blog/2017/09/desmos-learning-target-student-reflections-inspired-by-a-tweet/




In this latest episode of @MyFaveThm they ask @JSEllenberg what his favourite theorem is and it was a neat little ditty called Fermat's Little Theorem. Which basically goes like this. Take any prime number, say 7 and raise 2 to the power of that prime, 27. Then the answer when divided by the original prime 128/7 will always have a remainder of 2. This is easily used in any class where students have to work with expressions and primes. Listen here
Curriculum Tags: Gr7, Gr8
https://kpknudson.com/my-favorite-theorem/2017/9/13/episode-4-jordan-ellenberg

I love it when teachers share their entire semester via daily posts. I think that besides this being a great exercise for teachers to self reflect, its great for other teachers to get ideas. In this case, @DaveLanovaz is giving us a day by day for his grade 9 academic math class. Check out the first post here and the rest that follow.
Curriculum Tags: MPM1D
http://sine-of-the-times.blogspot.ca/2017/09/mpm1d1-day-1.html



Here is a crazy pattern that might get your kids thinking of Pythagorean theorem and higher dimensions.
Curriculum Tags: Gr8, MPM1D, MFM1P
https://www.youtube.com/watch?v=mceaM2_zQd8

Last week I someone showed me an order of operations problem that (potentially) had two different answers depending on how it was typed into the calculator. And through the rest of the week I learned that there was an order of operation rule that I had previously been unaware of. That is when you have something like 6/2(3), even though order of operations tells us that we do multiplication and division in the order they appear left to right, the implied multiplication of 2(3) is actually has precedence. There is not a lot of info on this (and I don't know of anyone that teaches this in elementary or secondary school) but clearly it exists as you can see by some of the documentation seen in the tweets that followed my original tweet including a calculator manual page, other calculator examples and the apparent reason (that implied multiplication is treated as a scale factor and thus takes prescience).
Curriculum Tags: All
https://twitter.com/davidpetro314/status/908082923856953345



Friday, September 15, 2017

Math Links for Week Ending Sept 15th, 2017

So there is a relatively new math podcast out: My Favourite Theorem is hosted by @niveknosdunk and @evelynjlamb and each episode they interview a mathematician and ask what their favourite theorem is. There is only a few episodes now but so far there is a mix of theorems well above gr12 to things that could be used in grades below gr12. Each episode is relatively short so it's a nice little podcast that you could listen to to get some neat ideas for class. For example, how about this video from 1966 about the mean value theorem. You can get all the podcasts and transcripts at this link but you can get more descriptions and extra stuff at the Roots of Unity Blog.
Curriculum Tags: All
https://blogs.scientificamerican.com/roots-of-unity/

The Theorem of the Mean Policeman (1966) from Eric Cornwell on Vimeo.

In this recent episode of 99% Invisible @mathbabedotorg talks about the problems with algorithms and other topics from her book "Weapons of Math Distruction".
 Curriculum Tags: All
http://99percentinvisible.org/episode/the-age-of-the-algorithm/

Ever see the path of satellites? Ever wonder why the path looks sinusoidal? Blame the Mercator map
Curriculum Tags: MCR3U, MHF4U
https://www.scienceabc.com/eyeopeners/why-do-satellites-orbits-look-like-a-sinusoidal-wave-on-the-world-map.html






Here's a TED-Ed video on some of the different ways to prove the Pythagorean Theorem.
Curriculum Tags: Gr8, MPM1D, MFM1P
https://www.youtube.com/watch?v=YompsDlEdtc

In this video @standupmaths does some work with i^i and makes connections to Euler's Identity.
Curriculum Tags: MCR3U, MCV4U, MHF4U
https://www.youtube.com/watch?v=9tlHQOKMHGA

This image they made with the digits of this prime is pretty cool
Curriculum Tags: All
https://www.youtube.com/watch?v=fQQ8IiTWHhg

I have always heard about Casting out Nines but never really knew what it was. It's actually pretty neat and it's a great way for your students to practice their math facts while practicing their math facts.
Curriculum Tags: Gr7, Gr8
https://www.youtube.com/watch?v=FlndIiQa20o

A painting for the artists in your class that connects to Pythagorean Theorem
Curriculum Tags: Gr8, MPM1D, MFM1P
https://www.almost-there.co.uk/unknown-pleasures-april-2016