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Spencer Bagley

@sbagley.bsky.social

Math professor, inveterate shitposter, pride is all year round β€οΈπŸ§‘πŸ’›πŸ’šπŸ’™πŸ’œ

1,568 Followers  |  218 Following  |  5,470 Posts  |  Joined: 28.06.2023
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Posts by Spencer Bagley (@sbagley.bsky.social)

Let me tell you something. Y’all are asking too many damn questions at every point of sale. I have to leave a comment, make a suggestion, donate to a charity, choose a method of payment three times and then multiple choice of ways to get a receipt.

Take the damn money and leave me alone.

09.03.2026 16:38 β€” πŸ‘ 2905    πŸ” 335    πŸ’¬ 55    πŸ“Œ 111
Preview
I Have So Many Nice Things To Say About The Avalanche And The Wild | Defector DENVER β€” The Colorado Avalanche’s home building, 26-year-old Puck Arena, is a blandly serviceable midpoint between the old-school kookiness of Calgary’s Saddledome and the blinding shininess of Edmont...

the final hockey blog of my western road trip comes from a great game in Denver: defector.com/i-have-so-ma...

09.03.2026 14:27 β€” πŸ‘ 40    πŸ” 3    πŸ’¬ 0    πŸ“Œ 1

It's called acting sweaty

09.03.2026 14:20 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

The run at the beginning is hilarious lol

09.03.2026 14:16 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Lol no I have not

09.03.2026 05:41 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Thank u for providing this content which is relevant to my interests

09.03.2026 05:22 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

NO NO NO YOU DON’T

GUYS LET ME PLEASE SPREAD THE GOSPEL OF FREE TAX USA

federal is free, state is $16, handles even my chaotic freelancer taxes just fine, same step-by-step β€œdesigned for normies” kind of interface as TurboTax but NOT EVIL

tell everyone you know

www.freetaxusa.com

09.03.2026 01:26 β€” πŸ‘ 11719    πŸ” 7122    πŸ’¬ 13    πŸ“Œ 3

Me reading your late night posts.

09.03.2026 05:04 β€” πŸ‘ 26    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

Holy shit dude, I can *hear* that last picture

09.03.2026 02:58 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

HE DID IT!!!! MATT DUNSTONE IS BRIER CHAMPION!!!!!!! πŸ₯ŒπŸ₯ŒπŸ₯ŒπŸ₯Œ

09.03.2026 01:05 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

A real thin double for two in the ninth??? πŸ₯Œ

09.03.2026 00:53 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Crocus pocus!

08.03.2026 22:55 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

IS THIS DUNSTONE'S YEAR FINALLY πŸ₯Œ

08.03.2026 19:03 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Thank you for carefully elucidating the one and only problem with this very sincere policy proposal, I will incorporate your feedback into my next revision

08.03.2026 18:29 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Queen Demon (The Rising World Book 2) Amazon.com: Queen Demon (The Rising World Book 2) eBook : Wells, Martha: Kindle Store

There's an Amazon Kindle sale on Queen Demon (the sequel to Witch King, 2nd book in the Rising World series) today for 2.99, US and Canada www.amazon.com/Queen-Demon-... #booksky

08.03.2026 15:57 β€” πŸ‘ 204    πŸ” 92    πŸ’¬ 14    πŸ“Œ 0

My daylight saving time bad take is that much like daylight itself, the time change should be continuously interpolated over a sigmoid function with a duration of two weeks or so

08.03.2026 18:03 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Bookmarking!!

08.03.2026 17:21 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Bookmarking!

08.03.2026 17:20 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

(β„• + ℝ)/2, checkmate atheists

08.03.2026 06:04 β€” πŸ‘ 9    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0
Project NExT panel: Grading (and what to do instead)
YouTube video by Spencer Bagley Project NExT panel: Grading (and what to do instead)

Here's a 17-minute version of some of my thoughts on this subject (there is also a 1-hour version lol)
youtu.be/saN0CteKwjc?...

08.03.2026 05:32 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Ok good point! I was trying to think about function transformations more broadly as other examples but couldn't convince myself that students see them as operations on functions. Composition is a good shout though!

08.03.2026 04:48 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

This pulls together so many threads that I have been thinking about around teaching for so many years. In particular it completely explains my whole shit about the difference between grading and assessment.

08.03.2026 04:47 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

(It is, of course, also everyone's first operator on functions)

08.03.2026 04:42 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I just had this thought and I want to write it down so I can think about it more later:
I think one reason why people learning calculus abuse derivative notation so much is that most familiar operations (on numbers) are binary but the derivative operator is unary.

08.03.2026 04:42 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

You ever start reading a book and just immediately go "well this is going to change the way I think about things forever"? Well anyway I just started C. Thi Nguyen's book The Score @add-hawk.bsky.social

08.03.2026 03:53 β€” πŸ‘ 5    πŸ” 1    πŸ’¬ 2    πŸ“Œ 0

I was literally just thinking this, lol.

08.03.2026 00:30 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

In your defense that is still a pretty good bit

07.03.2026 23:02 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I had to throw my hands up and walk away and be like "I gotta go," and she's calling after me like "he didn't get hurt!" Motherfucker, I gotta *go*, or I will be saying things that we'll both regret

07.03.2026 20:02 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Mind you that this is *after* she was complaining about the traffic calming devices the mayor has been installing and I told her how much safer they make my daily bike-to-work commute. Wild things to be saying to your neighbor who just told you he is a bicyclist!!!!

07.03.2026 19:56 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Neighbor lady complaining to me about how a bicyclist ran into her car. "They need to learn to watch where they're going." The only way I can figure out that it could have happened is that she overtook him and then turned in front of him. "He was going really fast!" Bitch how fast were *you* going?

07.03.2026 19:54 β€” πŸ‘ 4    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0