Math Links for Week Ending May 25th, 2018

I have been tinkering a lot with Desmos Activity Builder using their Geometry tools, and have come up with over 20 activities that span grade 7-9 ( here in Ontario). They mostly focussing on investigating simple geometric properties but some are more elaborate. I have been trying them out in classes this week and have already found ways to change them to make them better. So new versions will be out soon. Check them out and give me some feedback on how they could be improved.
Curriculum Tags: Gr7, Gr8, MPM1D, MFM1P
http://engaging-math.blogspot.ca/p/desmos-activities_10.html

We have an EggHunt activity on our Engaging Math blog so perhaps that's why this stands out for me from @MathEqualsLove. Here the kids search for eggs and inside are questions about multiplying polynomials. It fits with Easter but really you could do this at any time of the year.
Curriculum Tags: MPM2D, MFM2P
https://mathequalslove.blogspot.ca/2018/05/multiplying-polynomials-egg-hunt.html

Maybe it's because it references one of my favourite stories about Van Halen or perhaps the connection to Freakonomics but really it's the idea that is good from @RobertKaplinsky. That is, the idea that by asking someone to lie, you can find out the truth about what they know (with a shout out to @MrOrr_Geek).
Curriculum Tags: All
https://robertkaplinsky.com/van-halen-king-solomon-formative-assessment-common/

I love this 40s condensation of a 75 min @alexoverwijk calculus class. Forget that it's calculus and just focus on the idea that you don't need to be telling kids stuff all the time.
Curriculum Tags: All
https://twitter.com/AlexOverwijk/status/999676094163947521

Focus on #thinkingclassroom from #oame2018 75 minutes in 40 secs. Calc S’s solving optimization problems. I have yet to model a solution. Basically “we need to get a formula for what it is we are optimizing in terms of one variable. Then apply calculus.” #iteachmath #mtbos pic.twitter.com/VeJ7uRGKE5

— Alex Overwijk (@AlexOverwijk) May 24, 2018

I'm trying to figure out what I could do with this image. It looks too cool to not use somewhere
Curriculum Tags: All
https://twitter.com/AllenMath/status/997664000534986754

Another cool image on Instagram by witenry. What do you notice? What do you wonder? #iTeachMath #MTBoS pic.twitter.com/DS0fvKP87S

— Dan Allen (@AllenMath) May 19, 2018