Friday, January 19, 2018

Math Links for Week Ending Jan. 19th, 2018

For some teachers, having a clear and exact plan when executing a lesson is very important. For others, they fly by the seat of their pant. If you are part of the former, then you might like this new-ish feature from @Desmos where you can get a teacher guide for any activity (theirs, yours, or someone else's). The guide, has checklists, screenshots, teacher notes and a place for your own notes. To access the guide just click on the Teacher Guide button that appears on each Desmos activity now (even ones you made yourself). Read about it at the link below and then check it out yourself.
Curriculum Tags: All

I have always been a fan of the area formula for a trapezoid. Why? because it's often dismissed but it can actually be used to determine the area of a parallelogram, rhombus, rectangle, square and even a triangle. So I made this demo sketch that basically shows the calculations using the trapezoid formula and the traditional formula for each shape. And it's dynamic so you can drag the points to see the calculations change in real time.
Curriculum Tags: Gr7

Do you want a fun way to talk about unit rates? Then you might find this @desmos activity called Click Battle. I like how it starts with students seeing how fast they can click and that's the hook to helping them use and understand unit rate.
Curriculum Tags: Gr8, MPM1D, MFM1P, MAT1L, MAT2L

If you are a user of the @OnMathies tools then you know that they are continually improving them. One new improvement is that you now have the ability to save documents in the NotePad app. This is helpful if you want to create stuff ahead of time to use in class or for your students to open and play with.
Curriculum Tags: All

In grade 8 in Ontario we are supposed to classify quadrilaterals by their diagonal characteristics. This quadrilateral card sort from @theshauncarter could be a nice way to bring some prior knowledge up when starting that lesson.
Curriculum Tags: Gr8

 Looking for some tips on how to become more productive in your teaching? Then check out @MrOrr_Geek's post on his top 10 tools. Watch the video and then read the post for more details.
Curriculum Tags: All

I have probably posted this picture before but this is the first time that I have seen this version. The annotation is done by the company who built the ramps. If you want to see video of the actual jump, click here.
Curriculum Tags: MPM2D, MFM2P, MCF3M, MBF3C, MCR3U

A nice problem for geometry from @LauraWheeler
Curriculum Tags: MPM2D, MFM2P

Friday, January 12, 2018

Math Links for Week Ending Jan. 12th, 2018

Find out about mathematician @lewlefton who is also a stand up comedian (with math jokes) and @TheMathGuru who talks about her first day as a student teacher (and hails from Toronto).
Curriculum Tags: All

If you are talking about simulations then you might want your kids to try this one out from @vihartvihart and @ncasenmare where they use polygons who are happy or sad to simulate why segregation happens.
Curriculum Tags: MDM4U

If you are at all thinking of using visibly random groups in your class, one thing that might hold you back is getting started. Sure you get the kids into random groups but how do you keep control? Why not give them a non math related starter so they won't be shy about talking to each other with a purpose. So to help you @LauraWheeler has compiled her 90 Getting to Know You questions. So you now have one less excuse to get started.
Curriculum Tags: All

Some posts on medium from @mathgarden and @JamesTanton on why the current system of education is failing our students. The thread there is that math class can be a lot more enjoyable for students than it is right now and we can do it while still providing a quality math instruction.
Curriculum Tags: All

And along the same lines and also highlighted at Medium is @MathewOldridges essay on the importance of play along with your math classes. Watch the video and then read the essay.
Curriculum Tags: All

If you are in the beginnings combinatorics then why not start with something simple that students might relate to from @MathBeforeBed and while you are there check out the other math starters
Curriculum Tags: MDM4U

Are you new to 3 Act Tasks? Or perhaps helping someone get started? Then you might like this Sketchnote from @LauraWheeler to summarize the main points (and some useful links in the post as well)
Curriculum Tags: All

Friday, January 5, 2018

Math Links for Week Ending Jan. 5th, 2018

I always like when you can find a real world example of where math can help you out. In this case it's this recently released picture from NASA. It's unique because it is of the earth and the moon in the same shot. So you really get a sense the scale of, not only the distance between the two, but the relative sizes. So where's the math? Using some sine and cosine law you can verify the distance between the two and get a better idea of why the image looks the way it does (with the moon seeming smaller than it should be).
Curriculum Tags: MCR3U, MCF3M, MAP4C

Though these have been around for a while, these are all the multiplying binomial dynamic websketches in one place. Great for visually representing, practicing and gamifying from @dpscher
Curriculum tags: MPM2D, MFM2P, MCF3M, MCR3U, MBF3C

Hey, there's a new prime number and it's 23 million digits long.
Curriculum Tags: All

Some neat math here on the frequency of the sound of a champagne cork popping. By recording and visualizing the sound waves they are able to get the frequency and visually see the vibrations. Great for MHF4U in talking about combination of sinusoidal functions as well as just plane old frequency measuring.
Curriculum Tags: MCR3U, MHF4U

It's cold out there and the calculation to determine the temperature when considering the wind chill is a complicated mess with decimal powers but it would be a great exercise for students to model the temp at different wind chills. Via @RMByrne
Curriculum Tags: MCR3U, MHF4U

Some images for the new year. First a puzzle from @IJTANEJA
Curriculum Tags: All

And then of course, this classic
Curriculum Tags: MCV4U
And who doesn't want some mathematically shaped Christmas presents?
Curriculum Tags: Gr7
A post shared by David Petro (@lookimyourfather) on

Friday, December 29, 2017

Math Links for Week Ending Dec. 29th, 2017

I love this activity from @Desmos for introducing probability concepts. Especially the 36 spinner slides.  So much goes into coding those pages so having someone do that for you is a gift. Have your kids try it out.
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U
I like this activity from @MathEqualsLove about continuous vs discrete data. Students are given six cards with three one of three representations on it (situation, graph and variables). The other two are blank. Great for discussion on the ideas of continuous vs discrete data.
Curriculum Tags: Gr8, MDM4U, MAP4C

I really like the nature of randomness and as it turns out getting things to be truly random is pretty hard. This tech company that protects 10% of the websites on the net does so by requiring a regular stream of random numbers. And how do they do it? Lava lamps. Thanks to @Esping_Math for this one.
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U

Last week I posted a video about six fold symmetry and snowflakes. This week @vihartvihart mentions that but then makes snowflakes out of hexaflexagons
Curriculum Tags: All

This is a cool interactive infographic about the number of forest fires happening over the years.
Curriculum Tags: MDM4U

Friday, December 22, 2017

Math Links for Week Ending Dec. 22nd, 2017

Do you want to know how much garland you need for your conical shaped Christmas tree? How about how to win that Christmas match of Monopoly with your family? Listen to @FryRsquared on @SciFri as she talks about her (and @Mathistopheles ) new book "The Indisputable Existence of Santa Claus (The mathematics of Christmas)". Listen here
Curriculum Tags: All

We put a new activity on our blog that combines some of the work of @JoBoaler and @FawnpNguyen. Using visual patterns we made these 32 visual pattern cards to give to kids to talk about how the pattern grows. Then they develop the general term and finally I think that when you have all of the different terms you can start to develop some ideas on how to get those general terms more easily.
Curriculum Tags: Gr7, Gr8

@MrOrr_Geek has added a new feature to his @MathBeforeBed site. Just enter your email and you will get 20 pages each with two different prompts for your students to show their thinking. The Math Before Bed has great starters for kids of all ages. So check that out too.
Curriculum Tags: Gr7, Gr8

I like activities that involve students communicating mathematically to each other. In this activity from @MaryBourassa she has her grade 12 students pairing up. One person picks a graph and has to describe it to their partner. Their partner has to draw it. Get the downloads at the link.
Curriculum Tags: MHF4U, MCV4U

I love this video from @standupmaths for spreading precise Christmas mathematical cheer. These are instructions (and a rant) on how to make a scientifically and mathematically accurate snowflake. There is actually a lot of math here from six fold symmetry to trig and radian measure.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P, MPM2D, MFM2P, MHF4U

Here's a great Would You Rather from @ChrisHunter36 dealing with percents. Check the blog post out for all the details. Thanks to @Jstevens009 for pointing this one out.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P, MAT1L

Friday, December 15, 2017

Math Links for Week Ending Dec. 15th, 2017

A new site from the Ministry of Ontario's @mathconnects is Math Path Ontario. This site has many videos and other resources connecting Ontario math courses with careers. You (or your students) can either choose their course pathway and it will show careers that it will lead to or they can choose the career and it will show the proper course pathway. Plus once you click on the career, you will get a video connecting it to math.
Curriculum Tags: All

A new resource from @mathletepearce called  combines some concepts in number sense starting with counting and currently ending with adding and subtracting integers. And all done visually. I am sure there will be more to come but take a look at what is there so far.
Curriculum Tags: Gr7, Gr8, MAT1L, MAT2L

Thanks to @MSBJacobs for pointing out this site. It's for Chalk Dust Magazine which is "A Magazine for the Mathematically Curious". Many great articles and puzzles. And if you are quick you can enter the current Christmas based puzzle for a chance to win a copy of The Indisputable Existence of Santa Claus by Hannah Fry and Thomas Oléron Evans
Curriculum Tags: All

If you are dealing with metric prefixes or imperial metric conversions then this episode might be useful. It starts with the story of losing a Mars probe due to mixing up imperial and metric measurements and then ends with discussion of some of the larger metric prefixes. Listen here
Curriculum Tags: Gr7, Gr8, MPM2P, MBF3C

It's never good to here that students lack confindence in math but it appears that this is more prevalent with girls.
Curriculum Tags: All
I like when @ddmeyer releases his yearly talk video. In this one the theme is that "math is power, not punishment". That is, we need to do a better job of convincing students that it is worthwhile to know about math. There are some nice examples and even some Ontario teachers make a brief appearance (@MrOrr_Geek, @AlexOverwijk and @Wheeler_Laura). Definitely worth a watch.
Curriculum Tags: All

You can never have enough info about Pascal's triangle, if you ask me. Thanks to @KMarkPet for this one
Curriculum Tags: MDM4U

Some nice interactives from @dpscher on arrays and a nice video to go along with it from @JamesTanton giving a reason to use arrays in the first place (including for algebra)
Curriclum Tags: All

I always like @jessicahagy's Indexed site for helping students interpret points on a graph.
Curriculum Tags: MPM1D, MFM1P

Some data on the cost of running Christmas lights
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U