Recurring theme in stats is that our probabilistic intuition sucks. I love the birthday problem - estimate the probability that 2 people in the room of about 55 have the same birthday. 83% guessed <50%, a majority <20%. Actual answer: 98%. (Match found on checking 5 students) #teachmath
September 22, 2026 at 7:37 PM
Recurring theme in stats is that our probabilistic intuition sucks. I love the birthday problem - estimate the probability that 2 people in the room of about 55 have the same birthday. 83% guessed <50%, a majority <20%. Actual answer: 98%. (Match found on checking 5 students) #teachmath
What's in your piggy bank? 🐖
Explore this Problem to Ponder involving piecewise functions to consider the impact of replacing coins.
A great opportunity to discuss domain, range, and the maximum amount of money that would be possible!
🔗nctm.link/KmKEP
#HighSchoolMath #TeachMath
Explore this Problem to Ponder involving piecewise functions to consider the impact of replacing coins.
A great opportunity to discuss domain, range, and the maximum amount of money that would be possible!
🔗nctm.link/KmKEP
#HighSchoolMath #TeachMath
September 8, 2026 at 1:19 PM
What's in your piggy bank? 🐖
Explore this Problem to Ponder involving piecewise functions to consider the impact of replacing coins.
A great opportunity to discuss domain, range, and the maximum amount of money that would be possible!
🔗nctm.link/KmKEP
#HighSchoolMath #TeachMath
Explore this Problem to Ponder involving piecewise functions to consider the impact of replacing coins.
A great opportunity to discuss domain, range, and the maximum amount of money that would be possible!
🔗nctm.link/KmKEP
#HighSchoolMath #TeachMath
Emphasis on meaningfulness and sense-making as central to mathematical development. Memorization is fragile and recovery is difficult (as in forgot my password or lock cutter at my gym for forgotten combinations) but reasoning from basic meaning back to some fact is possible.
#MTBoS #TeachMath
#MTBoS #TeachMath
July 8, 2025 at 3:58 PM
Emphasis on meaningfulness and sense-making as central to mathematical development. Memorization is fragile and recovery is difficult (as in forgot my password or lock cutter at my gym for forgotten combinations) but reasoning from basic meaning back to some fact is possible.
#MTBoS #TeachMath
#MTBoS #TeachMath
January 15, 2026 at 5:27 AM
July 8, 2025 at 1:21 PM
YOU ARE SO COOL. All feeds are completely open to anyone. Just go to Feeds (left-hand menu and just find some). I follow I TeachMath, EduSky, AcademicSky, Disabled In STEM, Disability Justice, Learning Sciences, QuiltSky- you get the point
November 12, 2024 at 3:15 AM
YOU ARE SO COOL. All feeds are completely open to anyone. Just go to Feeds (left-hand menu and just find some). I follow I TeachMath, EduSky, AcademicSky, Disabled In STEM, Disability Justice, Learning Sciences, QuiltSky- you get the point
@nowatechie.bsky.social So happy to see you, girl!
Here is the #Edusky post by @alicekeeler.com
Includes the google sheet of educators, full of awesome humans to follow!
I also like #SciArt I#TeachMath #MathSky
Here is the #Edusky post by @alicekeeler.com
Includes the google sheet of educators, full of awesome humans to follow!
I also like #SciArt I#TeachMath #MathSky
#EDUsky for Educators
#EDUsky is an educator community. Come join us! A supportive group to talk about education and share resources.
alicekeeler.com
July 26, 2023 at 12:59 AM
@nowatechie.bsky.social So happy to see you, girl!
Here is the #Edusky post by @alicekeeler.com
Includes the google sheet of educators, full of awesome humans to follow!
I also like #SciArt I#TeachMath #MathSky
Here is the #Edusky post by @alicekeeler.com
Includes the google sheet of educators, full of awesome humans to follow!
I also like #SciArt I#TeachMath #MathSky
Are you a Math coach or instructor? This is a title you are going to want to take a look at alranbooks.com/shop/high-sc... be sure to enter the code Read2024 to get your discount. This book puts practical actions based on the research into your classroom.
@anneliserecord.bsky.social #teachmath
@anneliserecord.bsky.social #teachmath
March 19, 2024 at 2:40 PM
Are you a Math coach or instructor? This is a title you are going to want to take a look at alranbooks.com/shop/high-sc... be sure to enter the code Read2024 to get your discount. This book puts practical actions based on the research into your classroom.
@anneliserecord.bsky.social #teachmath
@anneliserecord.bsky.social #teachmath
#teachmath leaders in MA and others! MTA free 15 PDPs
MTA followers...not too late to register...https://web.cvent.com/event/06bd2c21-1948-497e-8449-13c9975e79cf/summary. Teaser below ⬇️ #imentored #strongground
February 27, 2026 at 5:38 PM
#teachmath leaders in MA and others! MTA free 15 PDPs
November 30, 2024 at 6:39 PM
Teaching children to mindlessly follow algorithms is such a frustrating thing to try to combat as a teacher- these kids often resist attempts to make math make sense!
#Teachmath
@tdsbmath.bsky.social
#Teachmath
@tdsbmath.bsky.social
November 27, 2025 at 11:45 PM
Teaching children to mindlessly follow algorithms is such a frustrating thing to try to combat as a teacher- these kids often resist attempts to make math make sense!
#Teachmath
@tdsbmath.bsky.social
#Teachmath
@tdsbmath.bsky.social
My age today is NOT a prime number, BUT a lot of people think my age is a prime number? How old am I? #mtbos #teachmath #mathstoday
September 18, 2025 at 4:17 PM
My age today is NOT a prime number, BUT a lot of people think my age is a prime number? How old am I? #mtbos #teachmath #mathstoday
Me: what’s the French word for 100?
Class: cent
Me: (writes on board) per cent, /100
Student in the front row shouts: wait, WHAT?!!
Class: laughter and nodding
Entire class witnessing the lightbulb moment: priceless.
#edusky #teachmath #math #percent
Class: cent
Me: (writes on board) per cent, /100
Student in the front row shouts: wait, WHAT?!!
Class: laughter and nodding
Entire class witnessing the lightbulb moment: priceless.
#edusky #teachmath #math #percent
a black and white icon of a percent symbol
Alt: a black and white icon of a rotating percent symbol
media.tenor.com
December 4, 2024 at 4:14 AM
Me: what’s the French word for 100?
Class: cent
Me: (writes on board) per cent, /100
Student in the front row shouts: wait, WHAT?!!
Class: laughter and nodding
Entire class witnessing the lightbulb moment: priceless.
#edusky #teachmath #math #percent
Class: cent
Me: (writes on board) per cent, /100
Student in the front row shouts: wait, WHAT?!!
Class: laughter and nodding
Entire class witnessing the lightbulb moment: priceless.
#edusky #teachmath #math #percent
🛍️ Jason earned $600 babysitting & spent it over 10 trips, $10 more each time. How much did he spend on trip 1?
Try this #MathFundamentals #ProblemOfTheWeek - guess & check, patterns, or algebra all work! 🧮 https://nctm.link/jhufF
#MathTeacher #ElementaryMath #TeachMath #STEM
Try this #MathFundamentals #ProblemOfTheWeek - guess & check, patterns, or algebra all work! 🧮 https://nctm.link/jhufF
#MathTeacher #ElementaryMath #TeachMath #STEM
August 11, 2026 at 12:01 PM
🛍️ Jason earned $600 babysitting & spent it over 10 trips, $10 more each time. How much did he spend on trip 1?
Try this #MathFundamentals #ProblemOfTheWeek - guess & check, patterns, or algebra all work! 🧮 https://nctm.link/jhufF
#MathTeacher #ElementaryMath #TeachMath #STEM
Try this #MathFundamentals #ProblemOfTheWeek - guess & check, patterns, or algebra all work! 🧮 https://nctm.link/jhufF
#MathTeacher #ElementaryMath #TeachMath #STEM
This is what my students said about community in Week 1 of the course #MathCommunity #MathEd #TeachMath #MathTeachers #MathChat #MathForAll #MathEquity #SocialJusticeMath #MathIsHuman #STEMCommunity #DataViz #MathInRealLife #MathStory #CommunityOfPractice #MathCulture
May 22, 2025 at 4:07 AM
This is what my students said about community in Week 1 of the course #MathCommunity #MathEd #TeachMath #MathTeachers #MathChat #MathForAll #MathEquity #SocialJusticeMath #MathIsHuman #STEMCommunity #DataViz #MathInRealLife #MathStory #CommunityOfPractice #MathCulture
Reading Knotting Numbers with my class #ethnomath #MathIsHuman #DataViz #MathCommunity #MathEd #TeachMath #MathTeachers #MathChat #MathForAll #MathEquity #SocialJusticeMath #MathIsHuman #STEMCommunity #MathInRealLife #MathStory #CommunityOfPractice #MathCulture
April 29, 2025 at 11:04 PM
Reading Knotting Numbers with my class #ethnomath #MathIsHuman #DataViz #MathCommunity #MathEd #TeachMath #MathTeachers #MathChat #MathForAll #MathEquity #SocialJusticeMath #MathIsHuman #STEMCommunity #MathInRealLife #MathStory #CommunityOfPractice #MathCulture
Week 4 ... we are moving along the trajectory #MathIsHuman #DataViz #MathCommunity #MathEd #TeachMath #MathTeachers #MathChat #MathForAll #MathEquity #SocialJusticeMath #MathIsHuman #STEMCommunity #MathInRealLife #MathStory #CommunityOfPractice #MathCulture
April 29, 2025 at 11:01 PM
Week 4 ... we are moving along the trajectory #MathIsHuman #DataViz #MathCommunity #MathEd #TeachMath #MathTeachers #MathChat #MathForAll #MathEquity #SocialJusticeMath #MathIsHuman #STEMCommunity #MathInRealLife #MathStory #CommunityOfPractice #MathCulture
Why does math coverage in the media lag behind literacy coverage? With math outcomes under scrutiny and policies shifting, it's time to amplify the conversation! @hollykorbey.bsky.social
🔗 Read more: kappanonline.org/korbey-why-m...
#teachmath
🔗 Read more: kappanonline.org/korbey-why-m...
#teachmath
Why math coverage ≠ literacy coverage - Kappan Online
The latest NAEP scores suggest that math instruction needs just as much coverage as reading. But covering math requires a slightly different lens.
kappanonline.org
February 20, 2025 at 1:47 PM
Why does math coverage in the media lag behind literacy coverage? With math outcomes under scrutiny and policies shifting, it's time to amplify the conversation! @hollykorbey.bsky.social
🔗 Read more: kappanonline.org/korbey-why-m...
#teachmath
🔗 Read more: kappanonline.org/korbey-why-m...
#teachmath
Nice little calculus problem: You want to increase a number of the form x^y (x,y > 1) by adding a small amount to either the exponent or the base. Which is more efficient? 5^8, for example. #teachmath
February 24, 2026 at 3:24 AM
Nice little calculus problem: You want to increase a number of the form x^y (x,y > 1) by adding a small amount to either the exponent or the base. Which is more efficient? 5^8, for example. #teachmath
Assignment I might try next semester: have ChatGPT do one of my old exams and have the students grade it. #teachmath #mathsky
November 29, 2025 at 11:42 PM
Assignment I might try next semester: have ChatGPT do one of my old exams and have the students grade it. #teachmath #mathsky
Has anyone had any disgruntled students from their past stir up trouble lately?
I got one from almost a decade ago and I wonder if it's because it's open season on professors right now and he was disappointed that I have no political posts on my socials to report. #teachmath
I got one from almost a decade ago and I wonder if it's because it's open season on professors right now and he was disappointed that I have no political posts on my socials to report. #teachmath
October 1, 2025 at 6:43 PM
Has anyone had any disgruntled students from their past stir up trouble lately?
I got one from almost a decade ago and I wonder if it's because it's open season on professors right now and he was disappointed that I have no political posts on my socials to report. #teachmath
I got one from almost a decade ago and I wonder if it's because it's open season on professors right now and he was disappointed that I have no political posts on my socials to report. #teachmath
Our probabilistic intuition is worse than we realize. One nice thing about a large class (51 present) is I can prove this with the birthday problem. The true probability is over 97%. Usually my classes are right around the break-even point of 23. #teachmath
September 12, 2025 at 4:38 PM
Our probabilistic intuition is worse than we realize. One nice thing about a large class (51 present) is I can prove this with the birthday problem. The true probability is over 97%. Usually my classes are right around the break-even point of 23. #teachmath
I need to anonymize student data for legal reasons using a 3rd party homework system (I'm going all-in on #MyOpenMath this year). Is there a smarter way to do this than emailing some randomly assigned user names (I'm thinking Transformers) to the students and keep my own look-up table? #TeachMath
August 3, 2025 at 6:03 PM
I need to anonymize student data for legal reasons using a 3rd party homework system (I'm going all-in on #MyOpenMath this year). Is there a smarter way to do this than emailing some randomly assigned user names (I'm thinking Transformers) to the students and keep my own look-up table? #TeachMath
I hate "verify the mean value theorem" problems in calculus. I feel like they undermine the whole point of the theorem.
But I admit it is a hard sell in first year calculus. You really need to prove stuff to appreciate how important it is. #teachmath
But I admit it is a hard sell in first year calculus. You really need to prove stuff to appreciate how important it is. #teachmath
April 7, 2025 at 12:30 AM
I hate "verify the mean value theorem" problems in calculus. I feel like they undermine the whole point of the theorem.
But I admit it is a hard sell in first year calculus. You really need to prove stuff to appreciate how important it is. #teachmath
But I admit it is a hard sell in first year calculus. You really need to prove stuff to appreciate how important it is. #teachmath
Mysterious symbol-pushing nonsense:
(g(h(x))' = g'(h(x))*h'(x)
Obvious:
dg / dx = (dg / dh) * (dh /dx)
#teachmath
(g(h(x))' = g'(h(x))*h'(x)
Obvious:
dg / dx = (dg / dh) * (dh /dx)
#teachmath
February 28, 2025 at 4:58 PM
Mysterious symbol-pushing nonsense:
(g(h(x))' = g'(h(x))*h'(x)
Obvious:
dg / dx = (dg / dh) * (dh /dx)
#teachmath
(g(h(x))' = g'(h(x))*h'(x)
Obvious:
dg / dx = (dg / dh) * (dh /dx)
#teachmath