Math Links for Week Ending Apr 1st. 2022

Featured Links

I have featured the @MathisVisual site before but I am such a big fan of visual representations that I think it's worth another reminder. Here are two recent posts. One on visualizing the volume of a cylinder and one on equivalent ratios. They do a really good job of conceptualizing each of the topics they choose while giving you, the teacher, as many prompts as possible about how to present the topic. 
Curriculum Tags: All
https://mathisvisual.com/
https://mathisvisual.com/volume-of-a-cylinder/
https://mathisvisual.com/revealing-equivalent-ratios-by-scaling/

Resource Links

The problem of related rates is not a new one for calculus and the standard examples of cars driving away from each other at right angles or shadows growing over time are common in calculus classes. That being said, I like the approach that @TheEricLee has taken here by actually giving hands on stations and experiments for students to do that match these classic problems. The shadow one is my favourite
Curriculum Tags: MCV4U
https://pbbmath.weebly.com/blog/hands-on-related-rates

Video/Audio Links

I always appreciate a good "which is the better deal?" problem.
Curriculum Tags: Gr7, Gr8
https://twitter.com/howie_hua/status/1509322077014167557

New TikTok video: Which one is the better deal? Would you rather apply the discount first or get taxed first? pic.twitter.com/74CT1XDsFV

— Howie Hua (@howie_hua) March 31, 2022

In our last @OAMEtalks podcast for the season, we ask each of our previous guests: "What they were doing online that they will continue to do as we move back to face to face?". Here are their responses:
Curriculum Tags: All
https://talks.oame.on.ca/season-4

Image Links

As a big fan of the quadratic formula I'm down with this meme
Curriculum Tags: MCR3U, MHF4U
https://twitter.com/howie_hua/status/1508569706046754816

Quadratic formula meme pic.twitter.com/izn0AJkgfU

— Howie Hua (@howie_hua) March 28, 2022

I do this all the time. My favourite is to "square numbers around 50 in my head" by using (50 + n)(50 + n) = 2500 + 100n + n2
Curriculum Tags: MPM2D, MFM2P, MCR3U, MCF3M, MBF3C
https://twitter.com/howie_hua/status/1508961572437196803

I like showing how polynomial multiplication can help us with mental math. If you know (x-1)(x+1)=x^2-1, what is 29*31? What is 19*21? What is 39*41? pic.twitter.com/xUrXLWsEg1

— Howie Hua (@howie_hua) March 30, 2022