Chris Lehmann
@clehmann.bsky.social
Founding Principal / CEO - Science Leadership Academy Schools
Co-Author of "Building School 2.0: How to Create the Schools We Need"
Dad to Jakob and Theo.
Still writes here when I can: http://practicaltheory.org
Co-Author of "Building School 2.0: How to Create the Schools We Need"
Dad to Jakob and Theo.
Still writes here when I can: http://practicaltheory.org
Pinned
Chris Lehmann
@clehmann.bsky.social
· Aug 24
20 Years of SLA
Tomorrow morning, Science Leadership Academy opens its doors for the 20th time. To say that it has been a heck of a run is purely an understatement. In that time, we've worked with thousands of kids, and we've done all that we can to show the world that an inquiry driven, project based, caring school really can make a difference in the lives of the students and the educators who inhabit it.
practicaltheory.org
New Post: 20 Years of SLA
What lessons have we learned as we open our doors for our 20th first day of school?
What lessons have we learned as we open our doors for our 20th first day of school?
I mean… this is illegal.
Trump: "If the Republicans win the House of Representatives and the United States Senate...I will issue a dividend to every adult citizen in the United States of America for $5,000."
September 10, 2026 at 2:27 AM
I mean… this is illegal.
Thank you to my dad, the union lawyer, and my mom, the union teacher, for leaning over the crib and teaching me to say, “Workers of the world unite, you have nothing to lose but your chains!”
You taught me well.
Happy Labor Day, everyone.
You taught me well.
Happy Labor Day, everyone.
September 8, 2026 at 2:08 AM
Thank you to my dad, the union lawyer, and my mom, the union teacher, for leaning over the crib and teaching me to say, “Workers of the world unite, you have nothing to lose but your chains!”
You taught me well.
Happy Labor Day, everyone.
You taught me well.
Happy Labor Day, everyone.
Just spent an hour or so using AI to build a project that would have taken me hours work to create - and what I created will save my teachers an hour of work each.
I didn't learn how to code more by doing it -- so this isn't about learning, but AI allowed me to psuedo-code my way to completion.
I didn't learn how to code more by doing it -- so this isn't about learning, but AI allowed me to psuedo-code my way to completion.
September 7, 2026 at 4:59 PM
Just spent an hour or so using AI to build a project that would have taken me hours work to create - and what I created will save my teachers an hour of work each.
I didn't learn how to code more by doing it -- so this isn't about learning, but AI allowed me to psuedo-code my way to completion.
I didn't learn how to code more by doing it -- so this isn't about learning, but AI allowed me to psuedo-code my way to completion.
From @jcasap.bsky.social :
REAL Tips for Managing Your Kid’s Screen Time
jcasap.substack.com/p/real-tips-...
REAL Tips for Managing Your Kid’s Screen Time
jcasap.substack.com/p/real-tips-...
REAL Tips for Managing Your Kid’s Screen Time
From a parent who has had a minor in their care for more than 34 years...
jcasap.substack.com
September 3, 2026 at 10:16 PM
From @jcasap.bsky.social :
REAL Tips for Managing Your Kid’s Screen Time
jcasap.substack.com/p/real-tips-...
REAL Tips for Managing Your Kid’s Screen Time
jcasap.substack.com/p/real-tips-...
In HS, I got to meet Gloria Steinem and spend an hour talking to her. She was one of the most amazing people I’ve ever met.
And later that day, I saw her speak to a room full of women, and it was so obvious the impact she had on their lives.
Dozens of women just came up to say thank you.
RIP.
And later that day, I saw her speak to a room full of women, and it was so obvious the impact she had on their lives.
Dozens of women just came up to say thank you.
RIP.
September 3, 2026 at 9:54 PM
In HS, I got to meet Gloria Steinem and spend an hour talking to her. She was one of the most amazing people I’ve ever met.
And later that day, I saw her speak to a room full of women, and it was so obvious the impact she had on their lives.
Dozens of women just came up to say thank you.
RIP.
And later that day, I saw her speak to a room full of women, and it was so obvious the impact she had on their lives.
Dozens of women just came up to say thank you.
RIP.
The closing of the Academy of Natural Sciences in Philly feels just ominous to me.
September 2, 2026 at 12:11 AM
The closing of the Academy of Natural Sciences in Philly feels just ominous to me.
Reposted by Chris Lehmann
Thanks to Dan Cogan-Drew for having me on AI In the Classroom Daily this week. It's always a blast to get the chance to talk with you!
Hope you all enjoy it -- "AI Didn't Eat My Homework (But It Helped)" #EdTech
podcasts.apple.com/us/podcast/a...
Hope you all enjoy it -- "AI Didn't Eat My Homework (But It Helped)" #EdTech
podcasts.apple.com/us/podcast/a...
AI Didn’t Eat My Homework (But It Helped)
Podcast Episode · AI in the Classroom - Daily · August 26 · 38m
podcasts.apple.com
August 30, 2026 at 8:49 PM
Thanks to Dan Cogan-Drew for having me on AI In the Classroom Daily this week. It's always a blast to get the chance to talk with you!
Hope you all enjoy it -- "AI Didn't Eat My Homework (But It Helped)" #EdTech
podcasts.apple.com/us/podcast/a...
Hope you all enjoy it -- "AI Didn't Eat My Homework (But It Helped)" #EdTech
podcasts.apple.com/us/podcast/a...
August 30, 2026 at 4:15 AM
This Phillies team is just special!
August 29, 2026 at 4:15 AM
This Phillies team is just special!
With each passing day, I have more and more respect for The Onion for still finding satire that is more ridiculous than real life.
Laura Loomer is taking credit for Milo getting detained by ICE.
August 28, 2026 at 11:19 PM
With each passing day, I have more and more respect for The Onion for still finding satire that is more ridiculous than real life.
Thinking about so many folks are wondering who will be as beloved for their talent and grace and humility and goodness and belief in inclusion as Dolly.
1/3
1/3
August 26, 2026 at 11:57 PM
Thinking about so many folks are wondering who will be as beloved for their talent and grace and humility and goodness and belief in inclusion as Dolly.
1/3
1/3
If we lose Michael Caine, I quit.
immediate lockdown for all individuals who have ever performed with the Muppets
August 26, 2026 at 6:16 PM
If we lose Michael Caine, I quit.
Dolly Parton was the best of us. Immensely talented, deeply kind and dedicated to giving back to the world.
She used her voice to make the world better.
May we all aspire to do the same.
She used her voice to make the world better.
May we all aspire to do the same.
Dolly Parton, Linda Ronstadt, and Emmylou Harris performing “Bury Me Under the Weeping Willow” on The Dolly Parton Show (1976)
August 25, 2026 at 11:54 PM
Dolly Parton was the best of us. Immensely talented, deeply kind and dedicated to giving back to the world.
She used her voice to make the world better.
May we all aspire to do the same.
She used her voice to make the world better.
May we all aspire to do the same.
Reposted by Chris Lehmann
The CDC is reporting a severe outbreak of phillies phever across the delaware valley
August 23, 2026 at 8:40 PM
The CDC is reporting a severe outbreak of phillies phever across the delaware valley
THE PHILLIES ARE A TEAM OF DESTINY!!! ARE YOU KIDDING ME?!?!?!?!
Hey @newskag.bsky.social -- DID YOU SEE THAT?!?!?!?!
Hey @newskag.bsky.social -- DID YOU SEE THAT?!?!?!?!
August 23, 2026 at 8:19 PM
THE PHILLIES ARE A TEAM OF DESTINY!!! ARE YOU KIDDING ME?!?!?!?!
Hey @newskag.bsky.social -- DID YOU SEE THAT?!?!?!?!
Hey @newskag.bsky.social -- DID YOU SEE THAT?!?!?!?!
The most amazing thing about Ted Lasso was its ability to make you care for those characters.
So far, the writing has been a bit too much “caricature” than “character,” which makes that a little harder.
There are very good moments, but they’re walking a bit of a tightrope through two episodes.
So far, the writing has been a bit too much “caricature” than “character,” which makes that a little harder.
There are very good moments, but they’re walking a bit of a tightrope through two episodes.
August 13, 2026 at 2:27 AM
The most amazing thing about Ted Lasso was its ability to make you care for those characters.
So far, the writing has been a bit too much “caricature” than “character,” which makes that a little harder.
There are very good moments, but they’re walking a bit of a tightrope through two episodes.
So far, the writing has been a bit too much “caricature” than “character,” which makes that a little harder.
There are very good moments, but they’re walking a bit of a tightrope through two episodes.
Once more with feeling… teachers do not “deliver instruction” or “deliver curriculum.”
Teachers teach.
Language matters.
Teachers teach.
Language matters.
August 12, 2026 at 8:12 PM
Once more with feeling… teachers do not “deliver instruction” or “deliver curriculum.”
Teachers teach.
Language matters.
Teachers teach.
Language matters.
Watched Ep. 1 of Season 4 of Ted Lasso.
No spoilers - I think the episode took a long time to find its footing. But the last ten minutes made me realize how much I missed these characters.
No spoilers - I think the episode took a long time to find its footing. But the last ten minutes made me realize how much I missed these characters.
August 11, 2026 at 12:33 AM
Watched Ep. 1 of Season 4 of Ted Lasso.
No spoilers - I think the episode took a long time to find its footing. But the last ten minutes made me realize how much I missed these characters.
No spoilers - I think the episode took a long time to find its footing. But the last ten minutes made me realize how much I missed these characters.
Reposted by Chris Lehmann
Senate Republicans ignore the Epstein survivors and confirm Todd Blanche.
House Republicans ignore Bernie and Emily Moreno and do nothing about Max Miller.
Zuckerberg's yacht ignores people in distress.
It's Donald Trump's party.
House Republicans ignore Bernie and Emily Moreno and do nothing about Max Miller.
Zuckerberg's yacht ignores people in distress.
It's Donald Trump's party.
August 9, 2026 at 1:30 PM
Senate Republicans ignore the Epstein survivors and confirm Todd Blanche.
House Republicans ignore Bernie and Emily Moreno and do nothing about Max Miller.
Zuckerberg's yacht ignores people in distress.
It's Donald Trump's party.
House Republicans ignore Bernie and Emily Moreno and do nothing about Max Miller.
Zuckerberg's yacht ignores people in distress.
It's Donald Trump's party.
To watch the U.S. Senate impugn the reputation of a man who spent his entire adult life trying to make Americans safer is just disgusting.
Shame on the GOP for what they did to Dr. Fauci today.
May history judge them all.
Shame on the GOP for what they did to Dr. Fauci today.
May history judge them all.
July 29, 2026 at 5:03 PM
To watch the U.S. Senate impugn the reputation of a man who spent his entire adult life trying to make Americans safer is just disgusting.
Shame on the GOP for what they did to Dr. Fauci today.
May history judge them all.
Shame on the GOP for what they did to Dr. Fauci today.
May history judge them all.
Dear colleges,
I get having kids apply in August and get early acceptances is a lure, but when you require rec letters to be due over summer break, teachers either have to work over their vacation or not meet your deadlines.
Please stop doing that. It's mean to teachers.
Love,
Mr. Lehmann
I get having kids apply in August and get early acceptances is a lure, but when you require rec letters to be due over summer break, teachers either have to work over their vacation or not meet your deadlines.
Please stop doing that. It's mean to teachers.
Love,
Mr. Lehmann
July 28, 2026 at 2:08 AM
Dear colleges,
I get having kids apply in August and get early acceptances is a lure, but when you require rec letters to be due over summer break, teachers either have to work over their vacation or not meet your deadlines.
Please stop doing that. It's mean to teachers.
Love,
Mr. Lehmann
I get having kids apply in August and get early acceptances is a lure, but when you require rec letters to be due over summer break, teachers either have to work over their vacation or not meet your deadlines.
Please stop doing that. It's mean to teachers.
Love,
Mr. Lehmann
C: Joel Embiid
PF: LeBron James
SF: Jaylen Brown
SG: VJ Edgecombe
PG: Tyrese Maxey
Dear Basketball Gods... please let Joel Embiid play 60 games this season and stay healthy for the playoffs. No more orbital bone fractures. No more appendicitis.
Just let us have this year. #Sixers
PF: LeBron James
SF: Jaylen Brown
SG: VJ Edgecombe
PG: Tyrese Maxey
Dear Basketball Gods... please let Joel Embiid play 60 games this season and stay healthy for the playoffs. No more orbital bone fractures. No more appendicitis.
Just let us have this year. #Sixers
July 24, 2026 at 4:03 PM
C: Joel Embiid
PF: LeBron James
SF: Jaylen Brown
SG: VJ Edgecombe
PG: Tyrese Maxey
Dear Basketball Gods... please let Joel Embiid play 60 games this season and stay healthy for the playoffs. No more orbital bone fractures. No more appendicitis.
Just let us have this year. #Sixers
PF: LeBron James
SF: Jaylen Brown
SG: VJ Edgecombe
PG: Tyrese Maxey
Dear Basketball Gods... please let Joel Embiid play 60 games this season and stay healthy for the playoffs. No more orbital bone fractures. No more appendicitis.
Just let us have this year. #Sixers
This is actually a moment I wish it wasn't summer break, because the entire school would be losing their ever-loving mind collectively if the LeBron signing was announced during the school day, and it would be just SO much fun.
July 24, 2026 at 3:53 PM
This is actually a moment I wish it wasn't summer break, because the entire school would be losing their ever-loving mind collectively if the LeBron signing was announced during the school day, and it would be just SO much fun.