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Oscar Levin

@oscarlevin.com

Professor, Mathematician, Developer, Author, Magician, and Oxford Comma Fan.

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08.03.2024
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Latest posts by Oscar Levin @oscarlevin.com

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Getting Started with PreTeXt (Mar 2026) | ScholarLattice Learn more on ScholarLattice.org!

Another free #PreTeXt workshop, this time on a Monday (3/2), only one hour, and focused on creating a worksheet using the pretext.plus online editor. Register here: scholarlattice.org/collections/...

23.02.2026 22:59 πŸ‘ 6 πŸ” 5 πŸ’¬ 0 πŸ“Œ 0

Thanks for the heads up. I'll see what I can do to fix that.

12.02.2026 00:32 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Getting Started with PreTeXt (Feb 2026) | ScholarLattice Learn more on ScholarLattice.org!

Our next "Getting Started with #PreTeXt" workshop is next week on Thursday, February 12, 12-2pm EST. Space is limited. Register for free: scholarlattice.org/collections/...

04.02.2026 20:22 πŸ‘ 5 πŸ” 5 πŸ’¬ 1 πŸ“Œ 0
Events Showcasing open-source technologies that innovate mathematics education and communication.

Want to get started with #PreTeXt? Maybe write your syllabus or a worksheet so it is accessible? @mathtech.org is hosting a free zoom drop-in office hours 12-2pm EST today. Link available at mathtech.org/events/

09.01.2026 16:05 πŸ‘ 4 πŸ” 4 πŸ’¬ 0 πŸ“Œ 1
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RFK Jr.'s new food pyramid puts meat, cheese and vegetables at the top Health Secretary Robert F. Kennedy Jr. has announced new dietary guidelines for Americans focused on promoting whole foods, healthy proteins and fats. And he has "declare[d] war" on added sugar.

I know that nutrition is complicated and there can be honest debates about the health and morality of eating meat... But can we at least agree that that there is zero way in which this is a "pyramid"?
www.npr.org/2026/01/07/n...

08.01.2026 16:23 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Screenshot of the linked document

Screenshot of the linked document

Excited to share the below announcement for our new app at pretext.plus -- author PreTeXt in your web browser, no GitHub required! Join the @mathtech.org Discord chat to grab an invite code: first come, first served!

pretext.plus/projects/80f...

01.01.2026 23:20 πŸ‘ 39 πŸ” 15 πŸ’¬ 2 πŸ“Œ 2
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Accessible course materials: a practical guide

MAA workshop on accessible course materials with @mitchkeller.phd and @oscarlevin.com! Free for AMS and MAA members. events.zoom.us/ev/AjygoFh_y...

07.12.2025 20:18 πŸ‘ 9 πŸ” 3 πŸ’¬ 1 πŸ“Œ 1

I assume this is an implicit differentiation question, with w, q, and z functions of t. In which case, you might want to use the chain rule.

02.11.2025 22:42 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

That was a good hint. Also, "abecedarium" is my new favorite word.

29.10.2025 16:10 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Open Digital Textbooks for Kenyan Schools Co-create next-generation open digital maths textbooks for new competency-based curriculums with students, teachers and caregivers.

I know there are lots of great causes to support, but in case you want to help Kenyan kids learn math... www.crowdfunder.co.uk/p/open-digit...

17.10.2025 18:00 πŸ‘ 2 πŸ” 3 πŸ’¬ 0 πŸ“Œ 1
Getting Started with GitHub This post is supported by National Science Foundation award #2449139. While anyone in the mathematical sciences should have no trouble engaging in the development of software supporting math-relate...

In today's blog post, @StevenClontz shares his passion for getting mathematicians (and other mathy academic types) up and running using GitHub tools that only require a web browser.

mathtech.org/2025/10/10/g...

10.10.2025 17:33 πŸ‘ 11 πŸ” 4 πŸ’¬ 0 πŸ“Œ 1
Screenshot of interactive applet that illustrates how scaling a column of a determinate scales the determinate's value by the same factor.

Screenshot of interactive applet that illustrates how scaling a column of a determinate scales the determinate's value by the same factor.

Use Doenet.org to create mathematical interactives to support inquiry-based learning: mathtech.org/2025/09/26/d...

28.09.2025 02:26 πŸ‘ 10 πŸ” 6 πŸ’¬ 1 πŸ“Œ 0
PreTeXt PreTeXt

Our Grand Opening continues on Monday as @oscarlevin.com shows us how PreTeXtBook.org can help authors create accessible and interactive scholarly documents. Join us Sep 15 at 9am Eastern. preview.scholarlattice.org/collections/...

12.09.2025 11:04 πŸ‘ 5 πŸ” 3 πŸ’¬ 0 πŸ“Œ 2

Well now I need to wait for this to come to streaming so I can do that. As long as I can figure out how to keep popcorn close enough to my treadmill.

29.08.2025 19:45 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Handouts and Worksheets in PreTeXt We all know that PreTeXt is great for writing textbooks. But did you know that it can also be used to create small, standalone course materials? Perhaps you want to create an in-class activity to en...

New PreTeXt feature: Handouts!

If you use guided notes in your teaching, or just want to make accessible versions of the printouts you bring to class, you can now author these in #PreTeXt and print directly from the browser (or save as PDF to annotate on a tablet).
mathtech.org/2025/08/17/h...

17.08.2025 17:55 πŸ‘ 20 πŸ” 8 πŸ’¬ 0 πŸ“Œ 0

Nope, Calculus 1 and Abstract Algebra. Real analysis would be a lot of fun though.

12.08.2025 23:31 πŸ‘ 1 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

I was thinking QUBES hub as well.

12.08.2025 23:23 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I'm not looking to rank courses. I'm hoping to find well written learning targets to help me build my specification-based grading course. And hopefully help other instructors do the same. Writing good, assessable learning targets is hard!

12.08.2025 21:04 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

This fall I'm going to use master/specification grading in two new courses. So can someone remind me where the big online repository of learning targets for all math courses is? Or if there isn't one, could someone please make that? Or help me make it?

#MathSky, #iTeachMath

12.08.2025 20:26 πŸ‘ 2 πŸ” 0 πŸ’¬ 5 πŸ“Œ 0

Wow, that output looks amazing! What typesetting system are you using?? 😁

02.08.2025 02:35 πŸ‘ 5 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Hypnotic Suggestion by Atticus837 (Sven's SudokuPad v0.591.4)

This sudoku is full of #math lessons: logic, combinatorics, symmetry, and joy. Try it here: sudokupad.app/qt0xjevecl. Then watch this: youtu.be/ddnLr8jWNeY?...

29.07.2025 22:11 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Zero dates back to the early days of Wimbledon, when a homophobic sportscaster was uncomfortable declaring the score Love-Love

14.07.2025 01:43 πŸ‘ 7 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

The better question, "if you are not able to stop the flow of asylum seekers, do you think the US has enough insane asylums to hold all of them?"

10.07.2025 13:34 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

This is a great question. For me, it means I see how I could teach the concept. I can see the whole story arc of how the mystery fits together.

19.06.2025 18:23 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Clearly they knew you wanted to decorate with purple roots. That's what you get for grocery shopping at Hobby Lobby

15.06.2025 14:19 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
AccessibilityPreTeXt logo

I tried to capture some of the advice from a seminar by an accessibility expert as part of the PreTeXt guide. See Subsection 4.40.3: Advice for Writing Image Descriptions
pretextbook.org/doc/guide/ht...

10.06.2025 00:30 πŸ‘ 7 πŸ” 3 πŸ’¬ 1 πŸ“Œ 0

The easiest way to use pandoc for pretext is to use the feature in vs code and pretext-tools. Assuming you have pandoc installed, search for the command pretext: convert file to pretext.

There are currently too many conversions in pretext-tools. I need to clean that up.

19.05.2025 18:08 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

if you click the first hyperlinked word on any wikipedia article, and then click the first hyperlinked word on the next one, and so on, within 10-15 clicks you will get to the wikipedia article for philosophy. and i think that's beautiful

04.05.2025 05:51 πŸ‘ 100 πŸ” 24 πŸ’¬ 21 πŸ“Œ 14
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Mathematician solves algebra's oldest problem All you need to do is toss out irrational numbers.

And yet, the recent piece circulating from popular science includes, "β€œ[I don’t] believe in irrational numbers,” he said."

www.popsci.com/science/alge...

04.05.2025 02:06 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Accessible Course Materials with PreTeXT Workshop Showcasing open-source technologies that innovate mathematics education and communication.

Accessible Course Materials with PreTeXT Virtual Workshop: Monday, May 19 to Thursday, May 22, 2025; 12-2pm EDT

Not only free, but limited participant stipends are available! Info at mathtech.org/workshops/ma...

01.05.2025 16:40 πŸ‘ 9 πŸ” 7 πŸ’¬ 0 πŸ“Œ 2