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Bob Lochel

@boblochel

HS math teacher. Interested in the intentional intersection of technology, conversation, and beautiful Mathematics. President - Philadelphia area NCTM affiliate.

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22.09.2023
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Latest posts by Bob Lochel @boblochel

Daydreaming about winning the lottery is also dumb.
Also, can I borrow 5 bucks?

29.05.2025 21:58 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
AP Stats Exam 2025 with Desmos!
AP Stats Exam 2025 with Desmos! YouTube video by Bob Lochel

Curious how these new features could be used to walk through some of this year's AP Statistics questions? Check out this tutorial video from @boblochel.bsky.social: www.youtube.com/watch?v=LnCT...

14.05.2025 11:23 πŸ‘ 6 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0

your 40 time was terrible. You know this.

27.04.2025 01:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Our long, national Shedeur Sanders nightmare is over.

26.04.2025 18:21 πŸ‘ 3 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

Great time of year for the beach. Enjoy.

19.04.2025 22:49 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

there's only a 60% chance of that at best

07.04.2025 23:10 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

It's as if probability is just a fleeting illusion

06.04.2025 19:48 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Preview
β€˜My career is over’: Columbia University scientists hit hard by Trump team’s cuts The US government has begun slashing US$400 million in research grants at Columbia University over pro-Palestinian campus protests.

These cuts are ruining people’s careers. This is not efficiency - capricious changes to funding damage science for generations.

www.nature.com/articles/d41...

15.03.2025 01:06 πŸ‘ 102 πŸ” 43 πŸ’¬ 2 πŸ“Œ 4

Can you think of a scenario when someone improved their score by 16 strokes from one day to the next like JT?
@pganews.bsky.social

14.03.2025 22:17 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Sorry not sorry.

07.03.2025 18:05 πŸ‘ 10149 πŸ” 2019 πŸ’¬ 235 πŸ“Œ 95

The screaming crowd who voted for deep cuts now screaming that they were cut. Welcome to the party pal!

01.03.2025 20:36 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

There are 12 deviled eggs, but 6 eggs were deviled in the egg-deviling process.

01.03.2025 18:55 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Desmos Distribution Updates
Desmos Distribution Updates YouTube video by Bob Lochel

Exciting updates to probability distributions on Desmos just dropped. Check it out!
youtu.be/0Yhf0V_lBgA?...

01.03.2025 16:13 πŸ‘ 6 πŸ” 4 πŸ’¬ 0 πŸ“Œ 1

Will you cede time to the gentleman from Apostrophe?

28.02.2025 23:32 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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How many sauces does a cat grow each month until adulthood?
#unitchat #iTeachMath

28.02.2025 21:07 πŸ‘ 283 πŸ” 23 πŸ’¬ 9 πŸ“Œ 4

I play the Linkedin games every day
I watch Severance

How is there not a daily @linkedin.com game where I swat the scary numbers into a bin?
I'd solve Cold Harbor better than 95% of CEOs!

22.02.2025 00:33 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Here’s the pitch:

They hire back the accidentally-fired bird flu folks *and* the accidentally-fired nuclear security guys BUT they put them in each other’s jobs β€” also by accident!

It’s TRADING PLACES meets FAILSAFE meets CONTAGION β€” and maybe also FREAKY FRIDAY!

Need a title.

18.02.2025 23:19 πŸ‘ 2856 πŸ” 489 πŸ’¬ 243 πŸ“Œ 52

Truly appreciate Orange leading the cars around at Daytona....leading us all towards many future left turns!

16.02.2025 23:52 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
A screenshot of an email notifying Spotsylvania parents that funding for a program for youth with disabilities has been canceled

A screenshot of an email notifying Spotsylvania parents that funding for a program for youth with disabilities has been canceled

the richest man in the world has decided that your kids don't deserve special education programs

16.02.2025 18:14 πŸ‘ 10638 πŸ” 4677 πŸ’¬ 343 πŸ“Œ 621

A @philadelphiaeagles.bsky.social - themed Slow Reveal Graph.
#iTeachMath #MTBoS
docs.google.com/presentation...

12.02.2025 13:45 πŸ‘ 4 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

This is fun.

10.02.2025 02:40 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

what if you reduce the margins oh so slightly...because I found I could make a 1.5 page minimal paper a 2 page robust document right quick.

08.02.2025 00:47 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Regarding reducing - in working w/ students on probability questions, they are often surprised when I suggest that not only is reducing NOT necessary, the un-reduced form provides better information. 10/36 as the probability of rolling a sum of 8 with 2 dice provides information which 5/18 doesn't.

06.02.2025 15:56 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Except the question doesn't say "evaluate", it says "work out". If the intent of the question is to assess student understanding of simplest forms, then this should be clear in the prompt.

06.02.2025 15:43 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Yep. Always need to keep in mind what the intent of our questions are. If we're assessing a parallel skill, we need to make that transparent.

06.02.2025 15:41 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Two numbers are reciprocals if the product of the two numbers is 1. The student has provided a number which satisfies this definition. Full marks.

06.02.2025 15:32 πŸ‘ 1 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

Chapter 1: Recursive Functions

03.02.2025 21:26 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

The Washington Commanders, trying their best to apply Zeno's Paradox to the gridiron.

26.01.2025 22:49 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Is there a new kind of toaster that I missed? Pretty sure 2025 toasters are still toasting the Mary Dolciani way.

24.01.2025 23:23 πŸ‘ 2 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0