No idea! They changed the curriculum since I taught it. Gotta think their website would have something though?

New Post: Daily Desmos #17 Fri-yay
dailydesmos.com/home/daily-d...

New Post: Daily Desmos #16 Triforce Thursday
dailydesmos.com/home/daily-d...

On the heels of the Allbirds news, I'd like to announce that I too am going to be selling AI compute infrastructure, instead of doing my job as a math teacher. I hope you'd considering buying stock in my company, now called NewDan AI.

New Puzzle: Daily Desmos #15 Turn That Monday Upside Down
dailydesmos.com/home/daily-d...

Daily Desmos Puzzle graph

New Puzzle: Daily Desmos #14 Two-sday
Can you recreate this? ->
https://dailydesmos.com/home/daily-desmos-14-two-sday

This is wonderful!

Daily Desmos Puzzle graph

New Puzzle: Daily Desmos #13 Case of the Mondays
Can you recreate this? ->
dailydesmos.com/home/daily-desmos-13-cas...

Your days of grading paper is over! Now you get to mark them!
Also enjoy the slightly less confusing set notation.

I think some stuff has changed since I last taught it, but there’s a nice progression to the problem sets sometimes.

Precalc! That’s most of it. I liked it.

A 3D print showing a local maximum that is not a global maximum

A 3D print showing a local minimum that is not a global minimum

New 3D prints: There's a theorem in single variable calculus called "The only critical point in town":

If a continuous function f: ℝ→ℝ has only one critical point and it is a local max/min, then it is a global max/min.

This isn't true for functions of two variables. These prints illustrate a local

!!! Awesome!

Heading out to NYC for an event for MoMath in their brand new space! I'll be guiding people though some fun geometry at @momath.bsky.social 's Family Friday event. bookzoompa.wordpress.com/2026/04/09/a...

New post: Daily Desmos #11 Transparent?
dailydesmos.com/home/daily-d...

where's the parabola??

Bonus game for today. Can you spot the parabola? Conic sections run from an eccentricity of 0 (circle), to 0<eccentricity<1 (ellipse), to eccentricity = 1 (parabola), eccentricity > 1 (hyperbola). Make a mark on the one line on this sketch that's a parabola!
docs.google.com/drawings/d/1...

New Post: Daily Desmos #10 Eccentric
dailydesmos.com/home/daily-d...

What if classroom tech is making teaching and learning too easy? A Colorado teacher says paper, pencils, and more effort changed his math class. The tradeoff: less convenience but possibly better learning.

New: When one teacher totally dropped ed-tech from his classroom, teaching and learning became harder. That might be why it's been successful.

www.chalkbeat.org/2026/04/07/t...

No. The eccentricitys of the orbits of the earth and moon are not 0. But if they were.... www.desmos.com/calculator/e...

New Puzzle: Daily Desmos #9 Super Duper Ellipse
dailydesmos.com/home/daily-d...

Not to mention I started counting at 0. #stupidcomputersciencepeople

It’s actually correct this time, but the last one got tooted out with the wrong number. Still working on the auto toot settings so I won’t make the mistakes that I would by tooting by hand!

Yea it's a "secret" thing that was put in for textbook manufacturers I think. I don't think I'm at liberty to share, but would bet the reddit r/desmos witches and wizards already know :-)

Love the use of polar!

BAH!

New Puzzle: Daily Desmos #8 Bullseye
Can you recreate this? ->
dailydesmos.com/home/daily-d...

sorry! Jan 2026. (it turns out that I still don't have the current year down. year += 1 isn't very sticky of a command for me)

www.nysedregents.org/algebratwo/1...

although, question 4 is sus in the 2025 exam, like they all have graphing calculators (and some kids in the state even have desmos). Kids, graph it and match your picture to their picture. No knowledge needed.

booooooo