Math teaching prep highlight: having blue and red colored math expressions combine and mix to purple! …I spend too much time on this stuff, but I share the intent with students and it makes them laugh. #iteachmath #edusky #mathsky

Any thoughts on a precalculus spirograph project? I'd love to start working on one! #mtbos #iteachmath #mathsky #edusky

Tomorrow, I get to help students analyze epicycloids and hypocycloids! Here we come spirographs! I am including the graphs they get for reference (I had fun making them on Desmos!) epi: www.desmos.com/calculator/j... hypo: www.desmos.com/calculator/f... #desmos #iteachmath #mathsky

Polygonal sine waves. I love this and am excited to show it to students. It helps students recognize that the trig we cover in school is just the beginning. #iteachmath #edusky #mtbos www.tumblr.com/1ucasvb/4288...

Happy Monday everyone! The product to sum trig identities are awesome! I find it amazing that sine and cosine waves combine in these ways and love that we can tie it back to the sin(A+B) and cos(A+B) identities for students. Wow! #trig #mathsky #edusky #MtBoS

Tried the prompt below before showing sinusoids in a Ruben's tube. Then we watched this quick video: youtu.be/_8KjE7MQHXM?... I want to convince students that anything that oscillates might be modeled with a sinusoid. They are everywhere! #mtbos #iteachmath #edusky #mathsky

I posted this a while ago, but this is still my favorite way to prove the addition identities for trig. What are your favorite approaches? #MtBos #MathSky #IteachMath

Exploring Islamic Constructions in Geometry and am considering incorporating Geogebra! Here is the 12-pointed star with a focus on dynamic color. Thinking about what else students might like to do! #Mathsky #iTeachMath #Geogebra www.geogebra.org/m/vngxfcfy

I love spinning the functions around the unit circle! I will show this one in class and find it relaxing to watch. The only question is, what song should I play as we spin the circle? #iteachmath #mathsky #MtBoS Video: www.youtube.com/watch?v=ASC2... Graph: www.geogebra.org/m/kutagxpj

Teaching trig on the xy plane and “All Students Take Calculus” came up. I’m ready for a new phrase. I’ll have a contest with my students to create their own phrases. Any ideas? #iteachmath #edusky #MtBoS #trigonometry

Anyone else still using chalk? I am one of the last at my high school and love it. If only I had sliding boards…one can dream. #hagoromo #iTeachMath #MathSky

Get to teach completing the square tomorrow with a Geometric perspective! Using this from Jamie Smith #MtBoS #ITeachMath #EduSky www.geogebra.org/m/kTEjFHJw

Shared this proof of Heron's formula today while playing symphony no. 9. I faded in the steps to the music and then had students discuss the steps. It was fun! Proof: shorturl.at/VYMT3 Slides: kntn.ly/d34ef3ce Music: kntn.ly/16e69aa3 #MtBoS #iTeachMath #EduSky

Excited to show the Geometry of the difference of squares tomorrow! I am using this Geogebra graph as a guide: www.geogebra.org/m/GwA3J77g #Mtbos #iTeachMath #Geogebra

I appreciate that my student has brought Redbull to the AMC math competition. That is dedication. 😀 #Redbull #iTeachMath

(2/2) When I use paper to track retakes: 1) It encourages conversation. Students come up and sign up. We chat. It’s great. 2) It requires intent. There is something special (still) about signing your name. 3) It’s easy to track and annotate. The binder is right there. I can mark easily.

(1/2) I spent a long time setting up a digital system for tracking and encourage test retakes. I used it for years, especially since 2020, but this year I went low tech: but paper and a binder. It has been fantastic. #MathSky #iTeachMath

(2/2) Seeing students apply their ideas to algorithms is still one of the best aspects of teaching. Here is the student algorithm that I was able to share back with the class today. Sometimes long division is a better choice than synthetic division! Also, these topics rule. #MathSky #iTeachMath

(1/2) Aren't students amazing? I showed how to use synthetic division to factor a polynomial. The first question I get is about how to avoid synthetic division and use long division! Then I realized I had a similar question three years ago! Here is the original approach: #MathSky #iTeachMath

Found a phone outside a local barbershop. The owner sent their son to get it. He was my student! We said hello and then I sat down to get my haircut. The barber was also my former student! Feeling lucky to have made so many connections over the years. #MathSky #iTeachMath

Has anyone tried the PicoCalc? It looks cool and I was thinking of trying it out. www.tomshardware.com/raspberry-pi... #Mtbos #iTeachMath

Happy pi day! #MTBoS #iTeachMath

Anyone else getting ads like this? By the way…I like when kids ask “when will we use this?” It is a great conversation starter!! #iteachmath #mtbos

Votes updated! #ITeachMath

Took a little poll in class today. So far only 1 student is all in for Tau. Where do you stand? #ITeachMath #MathSky #EduSky

Proved the sine and cosine sum formulas today! #Mtbos #iTeachMath

@drussellpsu.bsky.social I actually use your animations in my high school precalculus class! Thank you for all the brilliant work you do. #iTeachMath

Proving the angle sum and difference with sine and cosine tomorrow and just found this gem on Trigonography. trigonography.com?p=70 I haven't seen it before and prefer it to some other proofs I have used. Has anyone else used this? Do you have any that you prefer? #mtbos #iTeachMath

Just constructed all 6 trig ratios on a unit circle and my students were PUMPED! I also surprised them with large wooden chalk compass! After, we looked at a dynamic construction on Geogebra. I hope it helps them develop a visual sense of these ratios! #trig

I am really excited to try out this platform and see such a wonderful community of educators here! You are all so awesome!