John Hartmann
@jhartedu.bsky.social
20+ year teacher. Elementary. Former EdTech enthusiast. Now Math Interventionist. Interested in Instructional Coaching. From STL MO. Go Chiefs!
Reposted by John Hartmann
Looking for a routine that engages your students while building their number sense? Come explore Clothesline Math and how to use it in your classroom.
Learn more about Kristen Acosta's @kristenacosta.bsky.social How To Use Clothesline Math online workshop at grassrootsworkshops.com/wor...
Learn more about Kristen Acosta's @kristenacosta.bsky.social How To Use Clothesline Math online workshop at grassrootsworkshops.com/wor...
November 14, 2025 at 1:13 AM
Looking for a routine that engages your students while building their number sense? Come explore Clothesline Math and how to use it in your classroom.
Learn more about Kristen Acosta's @kristenacosta.bsky.social How To Use Clothesline Math online workshop at grassrootsworkshops.com/wor...
Learn more about Kristen Acosta's @kristenacosta.bsky.social How To Use Clothesline Math online workshop at grassrootsworkshops.com/wor...
The 8 SMP's are new in MN so we are creating lots of resources. If you want a refresh, check out our stuff. Today we released a free resource anyone can use (K-2 3-5 6-8 HS & educators) to notice the assets of others engaging in the SMPs. Learn more here: www.youtube.com/watch?v=2NS_...
FREE RESOURCE for the 8 Mathematical Practices from the MN Math Leaders
YouTube video by MN Council of Teachers of Mathematics (MCTM)
www.youtube.com
September 5, 2025 at 11:22 AM
Thanks to our local Scooters for supporting teachers.
Much appreciated.
Much appreciated.
September 3, 2025 at 1:23 PM
Thanks to our local Scooters for supporting teachers.
Much appreciated.
Much appreciated.
Reposted by John Hartmann
It's Mental Math Monday! How would you mentally calculate 15×24?
September 1, 2025 at 2:53 PM
It's Mental Math Monday! How would you mentally calculate 15×24?
When kids subtract from teen numbers:
🖐 Feel it (manipulatives)
👀 See it (take ones away)
✏️ Symbolize it (write equation)
That hands → eyes → brain path makes subtraction stick! #primaryteachers #primaryschool #firstgrade #firstgradeteachers #secondgrade #subtractionstrategies #homeschooling
🖐 Feel it (manipulatives)
👀 See it (take ones away)
✏️ Symbolize it (write equation)
That hands → eyes → brain path makes subtraction stick! #primaryteachers #primaryschool #firstgrade #firstgradeteachers #secondgrade #subtractionstrategies #homeschooling
September 1, 2025 at 12:01 PM
Reposted by John Hartmann
Today I helped some teachers come to grips with the fact that their 4th grade math textbook has many lessons that are NOT 4th grade standards.
Not only does the book NOT advocate good teaching...it is also teaching the wrong stuff.
#CMCforQualityMath
#UseHQIM
Not only does the book NOT advocate good teaching...it is also teaching the wrong stuff.
#CMCforQualityMath
#UseHQIM
August 28, 2025 at 12:25 AM
Today I helped some teachers come to grips with the fact that their 4th grade math textbook has many lessons that are NOT 4th grade standards.
Not only does the book NOT advocate good teaching...it is also teaching the wrong stuff.
#CMCforQualityMath
#UseHQIM
Not only does the book NOT advocate good teaching...it is also teaching the wrong stuff.
#CMCforQualityMath
#UseHQIM
Reposted by John Hartmann
📢 #ElemMathChat is back! Sept–May lineup features Joanna Hayman, Dr. Nicki Newton, Marria Carrington, Naomi Dupre-Edelman, Dr. India White, Dee Crescitelli, Jaliyla Fraser & more. Check out the lineup: bit.ly/466q4lf
We still have open dates Sign up to lead here: docs.google.com/spreadsheets...
We still have open dates Sign up to lead here: docs.google.com/spreadsheets...
Chat PR 25/26
September 4, 2025: Joanna Hayman 📢 #ElemMathChat is back! First chat of the year: Please join us in discussing, Students with disabilities & meaningful math as a human right. With @joannahayman.bsk...
bit.ly
August 25, 2025 at 11:43 PM
📢 #ElemMathChat is back! Sept–May lineup features Joanna Hayman, Dr. Nicki Newton, Marria Carrington, Naomi Dupre-Edelman, Dr. India White, Dee Crescitelli, Jaliyla Fraser & more. Check out the lineup: bit.ly/466q4lf
We still have open dates Sign up to lead here: docs.google.com/spreadsheets...
We still have open dates Sign up to lead here: docs.google.com/spreadsheets...
Reposted by John Hartmann
👀 Dab, grab, and shout hooray—
Number sense is built this way! 🎉
Bingo dots make math a game,
Number play will never be the same!
#MathFun #EarlyMath
Number sense is built this way! 🎉
Bingo dots make math a game,
Number play will never be the same!
#MathFun #EarlyMath
August 24, 2025 at 12:47 PM
👀 Dab, grab, and shout hooray—
Number sense is built this way! 🎉
Bingo dots make math a game,
Number play will never be the same!
#MathFun #EarlyMath
Number sense is built this way! 🎉
Bingo dots make math a game,
Number play will never be the same!
#MathFun #EarlyMath
Reposted by John Hartmann
If you're a math teacher looking to incorporate an exciting math routine or problem to use with your students, check out our mini workshops from these math educators.
Learn more at grassrootsworkshops.com/wor...
Learn more at grassrootsworkshops.com/wor...
August 15, 2025 at 12:13 AM
If you're a math teacher looking to incorporate an exciting math routine or problem to use with your students, check out our mini workshops from these math educators.
Learn more at grassrootsworkshops.com/wor...
Learn more at grassrootsworkshops.com/wor...
Reposted by John Hartmann
Welcome Neighbor STL seeks volunteer tutors for weekly 1-hr in-home English lessons with refugee women in St. Louis.
No experience needed—training & materials provided.
Sign up: bit.ly/4g6pCmC #ELL #STLedu
No experience needed—training & materials provided.
Sign up: bit.ly/4g6pCmC #ELL #STLedu
August 8, 2025 at 4:15 PM
Welcome Neighbor STL seeks volunteer tutors for weekly 1-hr in-home English lessons with refugee women in St. Louis.
No experience needed—training & materials provided.
Sign up: bit.ly/4g6pCmC #ELL #STLedu
No experience needed—training & materials provided.
Sign up: bit.ly/4g6pCmC #ELL #STLedu
youtu.be/RuoQVGTGifc?... 🎯"Why bridge through 10?" Because 9 + 7 is a drama queen... but 10 + 6 is chill. Teach the strategy, not just the sum. #MathFluency #mathfactfluency #primaryschoolteacher #primaryschool #mathcoach
Bridging ten card game. #mathshorts #mathfluency
YouTube video by Nicki Newton
youtu.be
July 23, 2025 at 11:43 AM
Reposted by John Hartmann
A math "trick" that can make subtraction easier:
July 5, 2025 at 2:28 PM
A math "trick" that can make subtraction easier:
Reposted by John Hartmann
I hope you will join us throughout the summer for this slow chat on strengthening k-5 students’ number skills and number sense. Begins June 16 in the Math in Practice/Sue O’Connell Facebook group. @nctm.org @mathedleaders.bsky.social @heinemannpub.bsky.social #elemmathchat
Join our summer slow chat and gather ideas for deepening K-5 students' numeracy skills. Each Monday from June 16 to July 21 a question will be posted. No need to register, just jump into the Facebook group any time that week to add a comment or read others' ideas. www.facebook.com/groups/Mathi...
June 13, 2025 at 11:59 AM
I hope you will join us throughout the summer for this slow chat on strengthening k-5 students’ number skills and number sense. Begins June 16 in the Math in Practice/Sue O’Connell Facebook group. @nctm.org @mathedleaders.bsky.social @heinemannpub.bsky.social #elemmathchat
Reposted by John Hartmann
As a math teacher, it feels like half of my job is building mathematical confidence. Here are some ways I do this:
June 4, 2025 at 5:57 PM
As a math teacher, it feels like half of my job is building mathematical confidence. Here are some ways I do this:
Had fun at our district math PD. What's wrong with me... it's summer. 🤣
June 3, 2025 at 10:13 PM
Had fun at our district math PD. What's wrong with me... it's summer. 🤣
Reposted by John Hartmann
In this episode of the Compass PD Podcast, Dr. Stephanie Brenner and Dr. Stephanie Evans take a deep dive into the complexities of dyscalculia—a learning difference that affects students' ability to understand and work with numbers.
youtu.be/E6uOZLF-9RA
youtu.be/E6uOZLF-9RA
May 30, 2025 at 12:40 PM
In this episode of the Compass PD Podcast, Dr. Stephanie Brenner and Dr. Stephanie Evans take a deep dive into the complexities of dyscalculia—a learning difference that affects students' ability to understand and work with numbers.
youtu.be/E6uOZLF-9RA
youtu.be/E6uOZLF-9RA
Reposted by John Hartmann
🤩 New #EduDuctTape Episode! 🥳
Today's episode features a conversation I had with Dr. @marcisseks.bsky.social and Dr. Nick Simone of the #StateOfEd Podcast.
We talked about AI, motivation, goal orientations, personalized learning, instructional coaching, + more!
#edusky
episodes.fm/1447821443
Today's episode features a conversation I had with Dr. @marcisseks.bsky.social and Dr. Nick Simone of the #StateOfEd Podcast.
We talked about AI, motivation, goal orientations, personalized learning, instructional coaching, + more!
#edusky
episodes.fm/1447821443
May 22, 2025 at 11:21 AM
🤩 New #EduDuctTape Episode! 🥳
Today's episode features a conversation I had with Dr. @marcisseks.bsky.social and Dr. Nick Simone of the #StateOfEd Podcast.
We talked about AI, motivation, goal orientations, personalized learning, instructional coaching, + more!
#edusky
episodes.fm/1447821443
Today's episode features a conversation I had with Dr. @marcisseks.bsky.social and Dr. Nick Simone of the #StateOfEd Podcast.
We talked about AI, motivation, goal orientations, personalized learning, instructional coaching, + more!
#edusky
episodes.fm/1447821443
Thoughts on "fraction greater than one" vs "improper fraction" (or both) language for elementary math? #ElemMathChat #MathSky #ITeachMath
a man with a beard wearing a red shirt says simple math
ALT: a man with a beard wearing a red shirt says simple math
media.tenor.com
May 19, 2025 at 9:22 PM
Thoughts on "fraction greater than one" vs "improper fraction" (or both) language for elementary math? #ElemMathChat #MathSky #ITeachMath
Reposted by John Hartmann
Join us for the last #ElemMathChat of the school year tonight when Pam Brett @pambrett.bsky.social leads us in discussing, 'Emotions as Catalysts for Beliefs in Math Class' See you at 8pm CST #ElemMathChat
May 8, 2025 at 8:26 PM
Join us for the last #ElemMathChat of the school year tonight when Pam Brett @pambrett.bsky.social leads us in discussing, 'Emotions as Catalysts for Beliefs in Math Class' See you at 8pm CST #ElemMathChat
Reposted by John Hartmann
Commercial board game #mathgame s. www.edutopia.org/article/boar...
Using Board Games to Teach Math to Young Children
Playing board and card games can improve number sense among children as young as 3—and it’s fun!
www.edutopia.org
May 8, 2025 at 2:54 PM
Commercial board game #mathgame s. www.edutopia.org/article/boar...
Reposted by John Hartmann
Playing board and card games can improve number sense among children as young as 3—and it’s fun! 🃏✨
#MathSky #ElementaryTeacher #kindergarten #preschool
#MathSky #ElementaryTeacher #kindergarten #preschool
Using Board Games to Teach Math to Young Children
Playing board and card games can improve number sense among children as young as 3—and it’s fun!
edut.to
May 8, 2025 at 12:17 PM
Playing board and card games can improve number sense among children as young as 3—and it’s fun! 🃏✨
#MathSky #ElementaryTeacher #kindergarten #preschool
#MathSky #ElementaryTeacher #kindergarten #preschool
Reposted by John Hartmann
🚨 We’re published in Ed Leadership!
Dr. Jenna Mancini Rufo & I challenge the myth that you’re either a “math person” or not.
Let’s create math classrooms where everyone belongs.
📖 Read: www.ascd.org/blogs/bustin...
#UDL #elemmathchat #EveryoneCanDoMath
Dr. Jenna Mancini Rufo & I challenge the myth that you’re either a “math person” or not.
Let’s create math classrooms where everyone belongs.
📖 Read: www.ascd.org/blogs/bustin...
#UDL #elemmathchat #EveryoneCanDoMath
Busting Math Myths That Keep Students and Teachers Stuck
A new school year offers a fresh opportunity to create a classroom environment where every student can develop a positive math identity.
www.ascd.org
May 6, 2025 at 12:47 AM
🚨 We’re published in Ed Leadership!
Dr. Jenna Mancini Rufo & I challenge the myth that you’re either a “math person” or not.
Let’s create math classrooms where everyone belongs.
📖 Read: www.ascd.org/blogs/bustin...
#UDL #elemmathchat #EveryoneCanDoMath
Dr. Jenna Mancini Rufo & I challenge the myth that you’re either a “math person” or not.
Let’s create math classrooms where everyone belongs.
📖 Read: www.ascd.org/blogs/bustin...
#UDL #elemmathchat #EveryoneCanDoMath
Reposted by John Hartmann
Join us for the last #ElemMathChat of the school year when Pam Brett @pambrett.bsky.social leads us in discussing, 'Emotions as Catalysts for Beliefs in Math Class' See you at 8pm CST on 5/8/25 #ElemMathChat
May 5, 2025 at 9:24 PM
Join us for the last #ElemMathChat of the school year when Pam Brett @pambrett.bsky.social leads us in discussing, 'Emotions as Catalysts for Beliefs in Math Class' See you at 8pm CST on 5/8/25 #ElemMathChat
So, for your Q, if you open discussion of how we can "level up" the math meaning of words we use, you can get to Keep-change-Flip & how it doesn't promote conceptual understanding.
Here's the google doc from that Words Matter session.
#iTeachMath #MTBoS
docs.google.com/document/d/1...
Here's the google doc from that Words Matter session.
#iTeachMath #MTBoS
docs.google.com/document/d/1...
Words Matter
Words Matter The words we use as teachers in math class have a great impact on how deeply our students learn and how they experience math as learners. Come share how you have changed some of your tea...
docs.google.com
May 1, 2025 at 10:33 PM
Reposted by John Hartmann
It's never to early to celebrate #Maythe4th & #StarWarsDay!
🪐Dive into the Star Wars galaxy with this interactive Explore Board!
Create your own character trading card, learn about lightsabers, translate Yoda-speak, & more!
https://f.mtr.cool/cmmhwwphoz
🪐Dive into the Star Wars galaxy with this interactive Explore Board!
Create your own character trading card, learn about lightsabers, translate Yoda-speak, & more!
https://f.mtr.cool/cmmhwwphoz
April 25, 2025 at 10:31 PM
It's never to early to celebrate #Maythe4th & #StarWarsDay!
🪐Dive into the Star Wars galaxy with this interactive Explore Board!
Create your own character trading card, learn about lightsabers, translate Yoda-speak, & more!
https://f.mtr.cool/cmmhwwphoz
🪐Dive into the Star Wars galaxy with this interactive Explore Board!
Create your own character trading card, learn about lightsabers, translate Yoda-speak, & more!
https://f.mtr.cool/cmmhwwphoz