Great idea, I’m thinking to reverse the numbers next and then repeat for Geometric and Harmonic sequences! Gonna use this for sure!

The expression (2x+1)/5 between -4 and 4, so the interval for the expression (2x + 1)/ 5 is less than 8, but the interval for x is less than 19/2 + 21/2 = 40/2 = 20:

?/5 > -4 when ? > -20, so 2x + 1 > -20 and x > -21/2

?/5 < 4 when ? < 20, so 2x + 1 < 20 and x < 19/2

I used Spinning Wheels and the kids laughed out loud. It was just too goofy and perfect. Good call!

What a great choice. I will use this for something in class for sure!

Great choice. Especially with the black background!

You know…that is so perfect. I am going to use it. I’ve just got make just theta spins to the beat!

That is lovely!!

I love that!

Wow. Just wow!

As a person who makes sure to carry tissues at all times, I am glad you have something that doesn't make you sneeze!

That’s a fair point. One way to spin it is to get them to share their approaches to adding and subtracting those numbers. It’s been a while since I’ve done this with students, but I remember there being potential for good math talk.

My students love Cramer’s rule. They like to look back on all their algebra work and see how this approach solves all 2x2 systems from previous classes. The fact that it works beyond is something of a bonus for us. Here is our justification for it:

Scientific notation is so much fun! Just show them the powers of ten video and hook them and the vast size of exponential numbers and the amazing infinitesimals of the atomic universe!!

Amazing.

I was going over a test today and the kids realized it was out of 67 points…it was a fun moment!

I’m going to incorporate this number in as many tests as I can!