Eli Luberoff

YouTube video by Graph Time with Sara & Sean How we animate in Desmos, Episode 3

How we animate in Desmos, Episode 3 of Graph Time with Sara and Sean is here!

youtu.be/PtrHw9-AFWQ

Desmos | Graphing Calculator

not sure why it's suggesting those... the syntax for domain restrictions in Desmos is { condition }, e.g.: www.desmos.com/calculator/j...

Fun fact: Desmos was _not_ bought by Amplify! We sold our curriculum business to Amplify, but Desmos Studio PBC (which runs the calculators) is separate. See more here: blog.desmos.com/articles/des...

Confirmed.

We recently added complex number support! help.desmos.com/hc/en-us/art...

Got it. As far as I know, they haven’t changed permissions. Only some lessons were available for free before too, even when it was part of Desmos

I don’t think this is true? First off, everything at Desmos.com (all calculators) is part of Desmos Studio and unaffiliated with amplify, and still free to use. Secondly, as far as I know the free lessons at amplify are still free. Can you say more of what you mean?

Going forward, hopefully this'll also be clearer. For example, any social media account branded something Desmos (e.g. here -- @desmos.com, www.tiktok.com/@desmosstudio) means Desmos Studio.

There were some communities that span both -- e.g. twitter (RIP), facebook, fellows. The plan we arrived at was that the ones that felt more Activity Builder/Curriculum focused (Desmos Educators FB group, Desmos Fellows) would be managed by Amplify, with Desmos Studio as welcome guests

Our intent 3 years ago was that "Desmos Classroom" would be teacher.desmos.com (now classroom.amplify.com) and student.desmos.com (now student.amplify.com), and Desmos Studio PBC would be everything on www.desmos.com (all of the calculator tools, for example)

Carl -- so, so sorry here. If it's helpful, I don't believe the line has been shifting, and if anything Amplify's rebrand from Desmos Classroom to Amplify Classroom hopefully helps make the existing line a lot more clear.

one of my favorite follows on bluesky

During the pandemic, the US implemented the most effective social welfare policies in our history -- programs that worked because they were big enough, simple, and universal. And then we withdrew them. This remains imo the central economic-policy story of our times. davisvanguard.org/2025/05/3hou...

🤣 to "tech brother." love that. But let the record show I'm not even the most selfless human in this Bluesky thread. Also that's a delightful Loki pic. Feel better!

Agreed! I sure hope that our calculators are never used to undermine either teachers or the learning process. Goal has always been to replace a useful but expensive and outdated tool (graphing calculators) with a free, more intuitive, more accessible alternative.

Favor -- could you share more about the "tricks" that feel problematic? We'd love for Desmos to support critical thinking instead of subverting it, and counterexamples are really helpful in making design choices.

fun! count me in -- email me at eli[at]desmos.com?

We have had nearly two decades of panic about Free Speech on Campus and not a single case, not even the ones they made up, were as bad as what's happening now

This is a good thread by one of my "trusted sources," @polotek.bsky.social.

So. I think it's important to share news about what's happening. But I'm trying to square that with the other reality that it contributes to doomscrolling.

I think we need to start putting these things into context and talking about what we are learning or what we should take away from it.

Sierpinski Triangle

here's a deterministic one that I also love (also uses recursion): www.desmos.com/geometry/kkq...

we've offered many times 😅. It's open source (Mathquill -- our branch with all of our accessibility work is here: github.com/desmosinc/ma...), but I think it's not quite a big enough pain point for them to be worth making it work with their architecture.

post a 🚨 spoiler 🚨 iff you've never seen this!!

write f() for the floor function i.e. round down to an integer and d() for the divisor function i.e. # of divisors

Consider 5:

f(5/1)+f(5/2)+f(5/3)+f(5/4)+f(5/5)
= 5+2+1+1+1 = 10

d(1)+d(2)+d(3)+d(4)+d(5)
= 1+2+2+3+2 = 10

Coincidence? #iTeachMath ♾️

Sierpinski Exploration

Yeah, it's one of my faves :)

Here it is with a little extra interactivity: www.desmos.com/geometry/x26...

I’m here.

I think sin x should work? The ambiguity is so real… but we try to be permissive in our interpretation if there’s ever an unambiguous meaning. Even sin 2x actually works… that was a big internal debate though

With inverted contrast. www.desmos.com/calculator/p...

Can't wait!

Enjoyed re-creating this visual in the @desmos.com Geometry tool: www.desmos.com/geometry/lx7... #mathsky

(a) stunning visual. (b) any differential geometers able to weigh in?