Any #MTBoS folks have suggestions for intro matrices / linear algebra books? I've had success using Holt in the past but am looking into more affordable alternatives.

It’s only a matter of time before students are able to work a problem, scan it, and have AI leave feedback and grade their work. I wish that day was today.

Student: Can we talk about D12? Me: The rap group or the standard? Either way the answer is yes.

Legend.

We need people to do X. We refuse to pay people to do X. Why does nobody want to do X?

My plan for this summer is to study up on some signal processing. This stuff is so cool! desmos.com/calculator/sjh…

This is actually how "confidence intervals" work in statistics. I'm being 100% serious. Read on. This is a really fun concept. x.com/HumansNoContex…

Adding fractions.. we can do that. desmos.com/calculator/q8z…

Friends in academia, let this serve as a reminder that a promotion without a significant raise isn’t a promotion, it’s a title change. Also, promotions come with a shift in responsibilities, not only more responsibilities. Don’t sell yourself short.

Just finished #GradingForGrowth. If you are even remotely interested in the alternative grading movement, I highly recommend it. Even if you’re not, it might change your mind.

Develop a deeper understanding of our three-dimensional world with Desmos 3D! Explore dynamic curves and surfaces in a 3D space, all while having your favorite Desmos 2D features at your fingertips. Read about this dynamic new tool in our blog: blog.desmos.com/articles/beta-… #Desmos3D

It's public. desmos.com/3d

Been seeing lots of Desmos 3D discussion around surfaces of revolution for Calculus. While parametrics are great for showing the act of rotation (see: desmos.com/3d/1a7f86ac77), I'm also loving this strategy, accessible to students who have seen equations of circles before:

Behrend is hiring! TT Position in MathEd psu.wd1.myworkdayjobs.com/en-US/PSU_Acad… NTL Position in Math psu.wd1.myworkdayjobs.com/en-US/PSU_Acad…

Formula sheets on exams.

Is anyone else having the issue in Chrome where Canvas by Instructure isn’t giving the option to delete objectives?

Some geometry of the dot product: desmos.com/3d/5oazs3wlcn.

Hear me out: Instead of multiple classes meeting 3-4X a week for 15 weeks. One class meets 3-4 hours per day (2 hour morning session + 2 hour afternoon session) for 15 days.

Math Help: If I have a nonlinear transformation T: R^m -> R^n, what do I call the set of solutions to T(x)=0? Is it just roots or zeros? Or is there a fancier name for it?