It's going to be interesting teaching concavity as a topic in AP Precalculus this year. To help my students remember the difference between concave up and concave down, I decided to make some fun new posters for my classroom!

Concave Up like a CUP
Concave Down like a FROWN

https://mathequalslove.net/concavity-posters/

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Had fun learning to play polar coordinate battleship during the AP Precalculus APSI today.

Fun story: when I moved into my current classroom six years ago, I found an old math journal article about how to play this game. I found it interesting, but I've never taught polar coordinates before.

Excited to modify the activity a bit and put my spin on things before using this year with AP Precalculus.

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Doing my AP Precalculus homework for the APSI I'm attending this week. Really liking this calculator skills circuit from Vicki Carter.

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