Math Links for Week Ending Feb 15th, 2013

On this day after Valentine's day, what better way to celebrate than calculating how likely it would be to find love (and life on other planets). Could be used for percents or probability
Curriculum Tags: Grade 7, Grade 8, MDM4U, MCF3M
http://www.brainpickings.org/index.php/2013/02/12/the-math-of-love/

I think that applications like this "Robot" kit is a great way to apply ideas in math classrooms. However I disagree with one of the things the guy says in the video. That "kids these days don't want to learn abstract math". I don't think most kids ever want to learn abstract math. However it is important to try to learn abstract content. Not for the sake of the content but for the sake of the brain exercise needed to master that content. Regardless, this is pretty cool.
http://mashable.com/2013/02/08/robots-drones-classroom/
Curriculum Tags: All

One of the things you can do if you have a YouTube account (and if you have a Gmail account, by default, you have one), is to create playlists of videos. Here a teacher has created two play lists. One to fit in to the Advanced Functions course and one for the grade 11 University course. And what she has done is linked the videos to the textbooks she is using by labeling the videos by textbook section. So the Advanced functions is linked to the McGraw Hill Textbook and the Grade 11 U videos are linked to the Nelson book.
MCR3U: http://www.youtube.com/playlist?list=PL267D675176AFDA06
MHF4U: http://www.youtube.com/playlist?list=PLB593B541513EA001
Curriculum Tags: MCR3U, MHF4U

Here is a nice simple introduction to inverse functions. Worksheet included
http://drawingonmath.blogspot.ca/2013/02/inverse-functions.html
Curriculum Tags: MCR3U

Here is a nice little activity about creating quadrilaterals based on being given one side.
http://donsteward.blogspot.ca/2013/01/complete-quadrilateral.html
Curriculum Tags: Grade 7






Here are three versions of Dan Meyer's Stacking Cups task. Its a great task for linear relationships and could be used for grade 9&10 applied & academic depending on whether you just use the idea of stacking a single cup or find two different types of cups and ask when will they have the same height.
Dan Meyer: http://blog.mrmeyer.com/?p=692
Andrew Stadel: http://mr-stadel.blogspot.ca/2013/01/styrofoam-cups.html
Fawn Nguyen: http://fawnnguyen.com/2013/02/05/20130204.aspx
Curriculum Tags: MPM1D, MFM1P, MPM2D, MFM2P

Although this teacher is talking about doing this for grade 8 curriculum, here in Ontario that fits the grade 10 academic curriculum. Teaching about perpendicular lines with geoboards but it could be done just as well with graph paper.
http://untilnextstop.blogspot.ca/2013/01/perpendicular-slopes-and-geoboards.html
Curriculum Tags: MPM2D

Even the cleaning person could be doing math
https://twitter.com/scottywrotem/status/199069633960087553/photo/1
Curriculum Tags: Grade 7, Grade 8, MFM1P, MPM1D

Yup we got yer bad math
http://apple.copydesk.org/2013/02/07/heres-one-for-the-pie-chart-hall-of-fame/
Curriculum Tags: Grade 7

Math links for the Week Ending Feb 8th, 2013

The first of two really good 3Acts Tasks from Dan Meyer. The first one is perfect for intersection of lines. Click here for the first act video. Click on this link for the full task
http://threeacts.mrmeyer.com/ditchdiggers/
Curriculum Tags:MFM2P, MPM2D


In the 2nd 3Acts Task, Dan uses bubble wrap to generated quadratic data. Below is the first video. Click here to see the entire task.
http://threeacts.mrmeyer.com/bubblewrap/
Curriculum Tags:MFM2P, MPM2D


Act 1 — Bubble Wrap from Dan Meyer on Vimeo.

This site gives a visual view of the real time traffic on Twitter. A really nice non standard representation of data

http://tweetping.net/

Curriculum Tags: Grade7, Grade8, MDM4U

We don't know what the largest prime number is but recently we discovered a new largest known prime. It has over 17 million digitshttp://lightyears.blogs.cnn.com/2013/02/06/largest-prime-number-yet-discovered/

Curriculum Tags: Grade 7, Grade 8

Indexed has always been a quirky site. With its venn diagrams and emotional graphs. Here's one that could be related to quadratic relations.
http://thisisindexed.com/2013/02/how-to-say-everything-without-a-word/
Curriculum Tags: MPM2D, MFM2P

Math links for Week Ending Feb 1st, 2013

How do you show a graph when you are on the radio? You convert it to music and have an opera singer sing it of course. I have just been getting caught up on some of my older podcasts and heard this great piece by Planet Money. Rather than just describe the graph seen on the right, they converted it to music and had it sung. Perfect for showing that data can be represented in many ways.
http://www.npr.org/blogs/money/2011/04/27/135737940/the-case-shiller-index-sung-as-opera
Curriculum Tags: Gr7, Gr8, MDM4U, MAP4C

Is the Body Mass Index (BMI) really that useful if it says people like Brad Pitt are considered overweight? In fact, Dwayne "The Rock" Johnson is actually obese according to the BMI. Here's another adjusted measure. This could be used for teaching order of operations in Gr 7 or Gr8. Just sayin
http://www.bbc.co.uk/news/magazine-21229387
Curriculum Tags: Gr7, Gr8

New activities from Texas Instruments. The first set has Linear functions, Analytic Geometry, Polynomials, Rational Functions & Normal Distributions
http://link.ti-enews.com/YesConnect/HtmlMessagePreview?a=pC3-l-skG1wkDYGjGXnVfu
The second set has Linear Functions, Quadrilaterals, Logarithmic Functions and Sampling Distributions
http://link.ti-enews.com/YesConnect/HtmlMessagePreview?a=pi0i0eskG1wkDYGjH1DDB-
Curriculum Tags: MFM1P, MPM1D, MFM2P, MPM2D, MHF4U, MDM4U



Want to develop the value of Pi using Archimedes Principle of Exhaustion? Who doesn't? You can do it here at the Nova site with a handy dandy interactive applet. While you are there check out their other applets for math and science as well as full episodes of Nova.
http://www.pbs.org/wgbh/nova/physics/approximating-pi.html
Curriculum Tags: Gr8

Numberphile just released a video post compiling the results from their quest to find YouTube's favourite number. Here is the blog post that gives the detailed results of the data as well as the summary video and original videos. Great for any Data Management class
http://periodicvideos.blogspot.co.uk/2013/02/popular-numbers.html
Curriculum Tags: Gr7, Gr8, MAP4C, MDM4U




In the Numberphile post below you may have noticed that there are some limit expressions. These were produced by an online LaTeX equation editor that lets you create equations and then paste HTML code into your web pages (or images into your documents). A useful thing if you have ever needed to put math in a webpage
http://www.codecogs.com/latex/eqneditor.php
Curriculum Tags: All

A great video by Numberphile on the problems with dividing by zero and the idea of 0⁰. A nice discussion of and (and others).
Curriculum Tags: MCV4U

Here is a nice image to talk about both bad math and rates
http://i.imgur.com/zH6jQlp.jpg
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P









And another in the Watermelon Series:
http://media-cache-ec0.pinimg.com/236x/0c/b9/05/0cb9056c7faaa6321c5a94dde55f5aa1.jpg
Curriculum Tags:All

Math Links for Week Ending Jan 25th, 2013

Math in the News is a website that puts out a slideshow on a semi regular basis. The slideshows indicate instances where math shows up in the news and includes ideas of where to incorporate them in math curriculum. The most recent one is from November of 2012 and of course includes info about the election. Currently there are 67 of these slideshows so there is quite a back catalog to get caught up with
http://www.slideshare.net/Media4Math/
Curriculum Tags: All

I know that I have already mentioned the Wild About Math blog but they have just uploaded another Inspired by Math interview. This time with Keith Devlin (The Math Guy -among other things). In this almost 2hour interview Keith talks extensively about teaching his MOOC (massively open online course) Introduction to Mathematical Thinking to over 64,000 students. I have blogged a bit about the concept here but this was really interesting to hear some of the logistical aspects. For example, he talked bit about the validity and method for students grading each other.
He also said a couple of things that really resonated with me. I will paraphrase here "Learning math is like learning to ride a bike. You can't learn by just having it explained to you. You have to try it and fail at it and try it and fail at it and then finally you will learn to ride a bike and you will never forget how to do it again" and "In high school I aced my calculus courses but didn't understand calculus until I was a graduate student TAing a calculus course"
Look for his new Math gaming app which should be coming out in about 3 weeks.
http://wildaboutmath.com/2013/01/22/keith-devlin-%E2%80%93-inspired-by-math-17/
Curriculum Tags: All

Here is a great site to get some sinusoidal (and maybe some linear) data for analysis. In fact, I got the sunrise sunset data for Windsor, massaged it into a spreadsheet and then created a Fathom file for you here to use. Have fun. Sundata.csv, Sundata.ftm
http://www.timeanddate.com/astronomy/
Curriculum Tags: MCR3U, MCF3M, MHF4U




With the Superbowl coming up, I thought I would share a slideshow I made for the 2008 Superbowl on all the different ways the money is spent on that one weekend.

Are you ready for some fooseball2008 from d2thep

Curriculum Tags: MDM4U


I am not completely sure how this could be used in a math class but I was fascinated by the connection of math and economics to show that LeBron James is actually severely underpaid at $17M per year. I am pretty sure you could tie this into statistics. Listen to NPR's Planet Money story here:
http://www.npr.org/blogs/money/2013/01/25/170176590/at-17-5-million-a-year-lebron-james-is-underpaid
Curriculum Tags: MDM4U

Dan Meyer did a nice montage of disparaging marks against math in the movies. One of the neat things about this clip was the website Subzin. On that site you can enter any words or phrases and it will search out where and when that appeared in their movie database.
http://blog.mrmeyer.com/?p=16222
Curriculum Tags: All

Another nice video from The Art of the Problem. This time on using tree diagrams with conditional probability.
http://www.youtube.com/watch?v=Zxm4Xxvzohk

Curriculum Tags: MDM4U

Math LInks for Week Ending Jan 18th, 2013

The Wild About Math blog tries to bring mathematics to the masses and has a series of interviews with people from the mathematics community. In this post, he has an over hour long interview with Steven Strogatz (Author of "The Joy of x" & "Calculus of Friendship" among other things). Its not a super professional interview but it is worth it to listen to for Strogatz. A few things that I heard that I liked were that the name Rational numbers has to do with the root word "ratio" and not in reference to being reasonable and that the dentist calls the gunk on your teeth "calculus" which comes from calcium. Another neat thing that resonated with me was the idea that in order to reach his readers, he does so with empathy for the way they feel about math.
http://wildaboutmath.com/2013/01/14/steven-strogatz-inspired-by-math-16/
Curriculum Tags: All

The Centre for Algebraic Thinking was developed to help fight problems with understanding algebra. The video, below, explains the impetus. Its a little boring at the beginning but it talks about what is on the site towards the end. In particular I like the Formative assessment questions and the Technology summary.
http://algebraicthinking.org/
Curriculum: All

 

 A Vi Hart video from last fall. This one is about vectors so it might be a nice addition to any discussion in Calculus & Vectors.

http://www.youtube.com/watch?v=XwIs1nlDQ2I 

Curriculum Tags: MCV4U

Math Links for Week Ending Jan 11, 2013

The Desmos online graphing tool has just got better. Now you can use a table feature to either create a scatter plot or show the table of values of a function. Even if you don't want to use the table feature, the fact that you can put multiple graphs on is a great feature. So you could create this cool Ironman graph using only functions and restrictions. That would be a neat assignment for a grade 11 functions class that would really show if they understand domain, range and restrictions (Maybe start with something simpler than Ironman though).
Tables examples: https://www.desmos.com/calculator/6jz8dtpxss
Ironman: https://www.desmos.com/calculator/sruf8wblll
Curriculum Tags: All

A nice resource for intersection of linear relations: The detention buy-out. Including video Minds On intro, PDF worksheet and sample lesson ideas
http://tapintoteenminds.com/2012/12/21/linear-relationships-detention-buy-out/
Curriculum Tags: MFM1P, MPM1D, MFM2P, MPM2D

I like this simple resource for students to practice exponentials. It is just a matching activity but the kind of thing that would take a bit of time to create and low and behold, someone has created it and shared it. I love the internet. For the actual slides, follow this link.
http://audrey-mcsquared.blogspot.ca/2013/01/activity-for-exponential-functions.html
Curriculum Tags: Curriculum Tags: MCR3U, MCF3M, MAP4C

New resources from Texas Instruments. TI-84 links include linear functions, exponentials, quadrilaterals, probability and more
http://link.ti-enews.com/YesConnect/HtmlMessagePreview?a=pi3TM-skG1wkDYGjHuHcCi
Curriculum Tags: MPM1D, MFM1P, MCR3U, MCF3M, MAP4C

Dan Meyer has had a post about his data from the previous year each year for the past few years. He keeps track of all kinds of metrics about himself on a daily basis. He has a challenge for you to do the same starting with your cellular habits. Though I like his favourite summary from 2009 (seen below). Its a great example of showing data that would be good for just about any class teaching single variable data management. I also love the "Behind the Scenes" post that talks about things like the technical aspects of creating the video and how much math went into the production:"Problem: you want the counter to read "0″ at 773 frames into the composition and "44651″ at 795 frames; Solution: a linear equation"
http://blog.mrmeyer.com/?p=16032
Curriculum Tags: Gr7, Gr8, MBF3C, MDM4U

Dan Meyer's 2009 Annual Report from Dan Meyer on Vimeo.

Vi Hart's latest symmetry installment. Sphereflakes continues on her journey dealing with symmetry and creating snowflakes. This time she does a great job of talking about symmetry by cutting through solids with planes. That part could even be used for some 3D plane discussions in Calculus & Vectors.
Curriculum TAGS: Gr7, Gr8, MCV4U

I have pointed out the falling dominoes chain reaction before but now, it seems, we have some more rigorous mathematics to explain why it happens. Of course you can also look at Dan Meyer's 3Act task that breaks up the video seen below and eventually asks how many dominoes would be needed to knock down a domino the size of a skyscraper (http://mrmeyer.com/threeacts/dominoskyscraper/).
http://www.technologyreview.com/view/509641/the-curious-mathematics-of-domino-chain-reactions/
Curriculum Tags: MCR3U, MCF3M, MAP4C

And here is an even bigger domino topple

I am sure that this wasn't a real Peanuts cartoon but its still funny. Thanks to @ddmeyer for reminding me of this one.

Along the same lines but way less appropriate is this one:

Math Links for Week Ending Jan 4, 2013

In this activity, students choose a linear equation then graph it. Then they choose a card that says something like "Double the slope" or "The y intercept is divided by 4". They then have to create the new equation and graph the result. Templates for game card and equation cards are included
http://teachingtechie.typepad.com/learning/2012/09/changing-all-those-ms-and-bslinear-practice-can-b-fun.html
Curriculum Tags: MPM1D, MFM2P

A really neat application of Pythagorean Theorem. What is the most efficient way to tie your shoes. Also a new blog that I hadn't seen before: e to the i pi (a nice nod to the Euler equation).
http://kevinbertman.edublogs.org/2011/06/27/shoelaces/
Curriculum Tags: Gr8G, MFM1P, MPM1D

Its a good data set, just not a good topic. Mother Jones Magazine did some research on mass shootings over the last 30 years. They have made all the data available in spreadsheet form ready to download. Easy to analyze in Fathom.
http://m.motherjones.com/politics/2012/12/mass-shootings-mother-jones-full-data
Curriculum Tags: MDM4U

Some recommendations for teachers of math to help stop student misconceptions. These would be particularly good for new teachers but worth looking at for all teachers. I like this one "Do not teach right-triangle trigonometry from inside the classroom!" Thanks to Joe Sisco for pointing this post out.
http://untilnextstop.blogspot.ca/2012/12/11-recommendations-to-middle-ish-grades.html
Curriculum Tags: All

According to a German study of over 3500 students, when it comes to improving in math, motivation (not necessarily ability) has the greatest positive effect. Read about it here:
http://www.scientificamerican.com/article.cfm?id=like-math-thank-your-moti
Curriculum Tags: All

Some nice images showing things that appear random but aren't and vise versa. Which of the images to the right do you think are random?
http://www.empiricalzeal.com/2012/12/21/what-does-randomness-look-like/
Curriculum Tags: Gr7P, Gr8P, MBF3C, MDM4U