Math Links for Week Ending June 26th, 2015

A couple of tasks from @mathletepearce dealing with direct and partial variation. The thing I like about these is that even though the context might be a little contrived ("Sir why not just measure one iPad at the beginning, man?") they are basically presented as a puzzle and way more interesting than just a table of values. And even though I think these fit the ideas of direct and partial variation pretty much right on the nose, I could definitely see doing this with grade 7 or 8 classes when talking about patterning (as an extension as the numbers are not whole numbers)
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
https://tapintoteenminds.com/3act-math/tech-weigh-in/
https://tapintoteenminds.com/3act-math/camera-paper-weigh-in/

Mary at the Making Math Meaningfull blog has been presenting at the Exeter conference and has been posting stuff on her blog. Much of it she has posted before but on this one she talks about a marble rolling activity that can be used to model non linear relations. The premiss that students roll a marble down ramps of varying heights to see how far the marble will roll then use that data to make a prediction. Pretty simple but effective activity.Download the handout here and check out the post at the link below
Curriculum Tags: MPM2D, MFM2P
http://marybourassa.blogspot.ca/2015/06/exeter-conference-day-4.html

I love the fact that on the last day of classes @MrOrr_Geek had his students do their own estimation challenges (in the style of @Mr_Stadel). Check out this post where he has examples of their videos from filling containers to covering stuff with stickies and then creating Explain Everything files to document them
Curriculum Tags: All
http://mrorr-isageek.com/final-assignment-estimation-challenge/

And of course that means it's a good time to include a post from @Mr_Stadel on an activity he thought of (but hasn't tried) on how fast you can cover something with stickies. It covers rates and area (and possibly data collection and modelling). Check it out.
Curriculum Tags: Gr7, Gr8, MFM1P, MPM1D
http://mr-stadel.blogspot.ca/2015/06/fastest-sticky-sticker.html




A couple of neat challenges from @DailyDesmos. Both of them use some of the advanced function notation features that allow you to use families of functions. One of them is linear and the other is periodic.

Curriculum Tags: MCR3U, MHF4U
http://dailydesmos.com/2015/05/28/griddy-0-basic/
http://dailydesmos.com/2015/05/28/griddy-1-basic/
http://dailydesmos.com/2015/05/27/periodic-0-advanced/
http://dailydesmos.com/2015/05/27/periodic-1-advanced/
http://dailydesmos.com/2015/05/27/periodic-2-advanced/
http://dailydesmos.com/2015/05/27/periodic-4-advanced/
http://dailydesmos.com/2015/05/27/periodic-5-advanced/

 I always like videos that give examples of quadratic relations and those that show projectile motion are the funnest. Here you will see a truck jumping 200ft and there are some nice side views so if you wanted to you could do some modelling using something like Tracker or have a discussion similar to what Dan Meyer does here.
Curriculum Tags: MPM2D, MFM2P, MCR3U, MCF3M, MBF3C
https://www.youtube.com/watch?v=8ZdI9qUJzno

My 12 year old daughter gave me a math-centric father's day card this year "
Curriculum Tags: MPM1D, MFM1P
https://twitter.com/davidpetro314/status/613670491577040896/photo/1

This was one of my #FathersDay cards this year "Your PLAN has been FOILed" #mathchat pic.twitter.com/EmdVXZrO5v

— David Petro (@davidpetro314) June 24, 2015