Shaun Errichiello
@shaunteaches.bsky.social
I teach math and I am excited about it!!!
That is lovely!!
November 12, 2025 at 4:59 PM
That is lovely!!
Wow. Just wow!
November 11, 2025 at 3:07 AM
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!
November 11, 2025 at 3:06 AM
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.
November 10, 2025 at 1:35 PM
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:
November 10, 2025 at 12:46 PM
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!!
November 10, 2025 at 12:39 PM
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!!
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!
I’m going to incorporate this number in as many tests as I can!
November 7, 2025 at 3:30 AM
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!
I’m going to incorporate this number in as many tests as I can!
Great question. Can I post an answer or is that spoiling it?
November 3, 2025 at 1:07 PM
Great question. Can I post an answer or is that spoiling it?
I would still teach it, because I also want my students to see when, and when not, to apply a tool. It’s like helping students do 1000 - 999 with, and without, stacking and borrowing. Seeing the contrast in algorithms on a particular problem is really fun and interesting!
November 3, 2025 at 1:05 PM
I would still teach it, because I also want my students to see when, and when not, to apply a tool. It’s like helping students do 1000 - 999 with, and without, stacking and borrowing. Seeing the contrast in algorithms on a particular problem is really fun and interesting!
This is great! If anyone would like to speak with my high school students, please let me know!
November 3, 2025 at 1:02 PM
This is great! If anyone would like to speak with my high school students, please let me know!
This looks interesting! Are we trying to solve for x given that 2a + b = c?
Also, I followed your link, but where can I see the previous problems like this?
Also, I followed your link, but where can I see the previous problems like this?
November 3, 2025 at 12:58 PM
This looks interesting! Are we trying to solve for x given that 2a + b = c?
Also, I followed your link, but where can I see the previous problems like this?
Also, I followed your link, but where can I see the previous problems like this?
(2/2) I use the fact that (x - (a - bi))(x - (a+ bi)) = x^2 -2ax + (a^2 +b^2) and I like this because it emphasizes the sum of squares. Your student's approach simplifies to the same short cut and I love it! Way to go!!!
October 29, 2025 at 12:47 AM
(2/2) I use the fact that (x - (a - bi))(x - (a+ bi)) = x^2 -2ax + (a^2 +b^2) and I like this because it emphasizes the sum of squares. Your student's approach simplifies to the same short cut and I love it! Way to go!!!
(1/2) I really like method 2. I haven't been rewriting it as the difference of squares and I think my students will love it! Thanks!
October 29, 2025 at 12:44 AM
(1/2) I really like method 2. I haven't been rewriting it as the difference of squares and I think my students will love it! Thanks!
This sounds amazing!! Do you know if there are similar conferences on the East Coast?
October 28, 2025 at 2:52 AM
This sounds amazing!! Do you know if there are similar conferences on the East Coast?
You got me with this and then I started reading your posts! Love the math memes. 😀
October 28, 2025 at 2:34 AM
You got me with this and then I started reading your posts! Love the math memes. 😀