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Matt Barnum

@mattbarnum.bsky.social
5.3K followers 459 following 330 posts

Ideas editor at Chalkbeat www.chalkbeat.org/newsletters/ideas mbarnum@chalkbeat.org

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Matt Barnum @mattbarnum.bsky.social · 09/10/2026
New- How can a parent or a policymaker tell if an elementary school is contributing to student learning? Despite the proliferation of education data, this is much harder than it seems! www.chalkbeat.org/2026/10/08/m...
chalkbeat.org
How do you know if an elementary school is helping students learn?
Many parents want to know how much a school helps children learn. For elementary schools, even our best measures can struggle to answer that question.
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Matt Barnum @mattbarnum.bsky.social · 05/10/2026
the null on SAT is especially interesting considering the long-standing concern that education majors as a group don't have especially high test scores (among college students/grads)
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Matt Barnum @mattbarnum.bsky.social · 05/10/2026
to be fair and clear they didn't only report two of these lines, but leaning into these subgroup cuts with large error bars is really odd to me
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Matt Barnum @mattbarnum.bsky.social · 05/10/2026
sorry to belabor, and this is not your paper obvi, but reporting two of these lines in the abstract is just 🤨
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Matt Barnum @mattbarnum.bsky.social · 05/10/2026
not to pick on these authors, because this is common, but I think it's really unfortunate when an abstract only describes subgroup effects. The main effect matters a lot!
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Matt Barnum @mattbarnum.bsky.social · 02/10/2026
I agree to an extent, but some of this reflects having students from wealthier families pay more so lower-income students can pay less — which certainly seems defensible
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Matt Barnum @mattbarnum.bsky.social · 01/10/2026
both sides of the political spectrum find this to be an appealing talking point (for different reasons), which I suspect is why it's so often repeated in the media and so hard to kill as an idea
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Matt Barnum @mattbarnum.bsky.social · 01/10/2026
New-  We've all heard about the spiraling, skyrocketing, and soaring rates of college tuition. In reality, undergrad net tuition education has been stagnant or even declining for roughly two decades. So why do very few people know this? www.chalkbeat.org/2026/10/01/w...
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Chalkbeat @chalkbeat.org · 22/09/2026
Once a premier business high school with 3,000 students, Murry Bergtraum has shrunk to about 90 kids. Why have city leaders let the struggling NYC school stay open?
bit.ly
From 3,000 students to about 90: Inside the 20-year decline of NYC’s Murry Bergtraum High School
Once a premier business high school with 3,000 students, Murry Bergtraum has shrunk to about 90 kids. Why have city leaders let the struggling NYC school stay open?
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Matt Barnum @mattbarnum.bsky.social · 23/09/2026
New: There's a lot of rhetoric about how dropping the SAT/ACT affects who gets into college and how prepared they are. I took a detailed look at the research www.chalkbeat.org/2026/09/22/s...
chalkbeat.org
Who wins when colleges drop SAT requirements?
Colleges have fought over admissions tests for years. Research suggests changing the rules matters — just less than either side might think.
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Matt Barnum @mattbarnum.bsky.social · 16/09/2026
So many people think that the students who can't pay back their loans are going to like Vassar or Oberlin or even Harvard. In reality they're going to schools like Legends Barber College or Construction Training Center. www.npr.org/2026/09/16/n...
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Matt Barnum @mattbarnum.bsky.social · 14/09/2026
Contrary to what I sense is a vague conventional wisdom: the recent growth in educational attainment is not at all historically anomalous. lkatz.scholars.harvard.edu/sites/g/file...
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Matt Barnum @mattbarnum.bsky.social · 11/09/2026
New: Why "high-dosage tutoring" didn't (and probably couldn't) live up to the hype — and why it still might be a policy worth pursuing. www.chalkbeat.org/2026/09/10/h...
chalkbeat.org
High-dosage tutoring was supposed to transform learning. What happened?
The latest research offers some sobering results. But it would be foolish to write off tutoring too quickly.
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Matt Barnum @mattbarnum.bsky.social · 08/09/2026
See eg www.chalkbeat.org/2026/09/08/p...
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Matt Barnum @mattbarnum.bsky.social · 08/09/2026
kudos goes to @ericameltzer.bsky.social for flagging this point!
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Matt Barnum @mattbarnum.bsky.social · 08/09/2026
New: The U.S. has moved up on international test score rankings — generally by falling less swiftly than other countries. I don't think that means oh nothing to worry about. But it does make me question U.S.-specific explanations for these trends. www.chalkbeat.org/2026/09/08/p...
chalkbeat.org
U.S. students score above average in reading. Here’s why that’s not good news.
PISA international test results show concerning global declines in student learning. U.S. students posted some of their lowest scores ever in math and reading, but other countries are doing worse.
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Matt Barnum @mattbarnum.bsky.social · 02/09/2026
New: Politicians of all ideological stripes agree that schools should embrace CTE. I take a look at whether career-education in high schools actually helps students in the short- and long-run. cbnewsletters.chalkbeat.org/p/career-tec...
cbnewsletters.chalkbeat.org
Career education can help students. But expanding it may come with real risks.
Established CTE programs have delivered promising results. New research shows why adding career programs elsewhere may not produce the same payoff.
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Matt Barnum @mattbarnum.bsky.social · 01/09/2026
wait the Ivies don't educate the vast majority of students??
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Matt Barnum @mattbarnum.bsky.social · 28/08/2026
New: 1 in 80 American public school students now receive a fully virtual education, according to data analyzed by @petrinkae.bsky.social + me. It's a pandemic-era surge that's been sustained. Yet discussions about the quality of virtual ed have been oddly quiet. www.chalkbeat.org/2026/08/27/v...
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Matt Barnum @mattbarnum.bsky.social · 27/08/2026
this study is important and interesting but I don't think it actually evaluates the net impact test-optional policies on disadvantaged students (contrary to how some have interpreted it)
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Matt Barnum @mattbarnum.bsky.social · 25/08/2026
New: An emerging body of research finds that there's one small problem with AI-powered tutors — most students don't use them productively or at all. www.chalkbeat.org/2026/08/25/a...
chalkbeat.org
In theory, AI tutors can help students learn. Getting kids to use one is another matter.
The latest AI tutoring research points to a stubbornly human problem — getting students to engage. “Access was nearly universal but engagement was thin,” a new study found.
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Matt Barnum @mattbarnum.bsky.social · 21/08/2026
hope your family took it okay when you said you'd have to miss college drop off to attend this webinar!
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Matt Barnum @mattbarnum.bsky.social · 19/08/2026
I think this piece and underlying research is also relevant to the discussion. the studies showing value of 4-year over 2-year college are combining peer, resource, signaling, and college-type effects—all with different policies implications www.chalkbeat.org/2026/08/18/s...
chalkbeat.org
How American higher education helps the rich get richer
Higher education’s admissions hierarchy is also a spending hierarchy. The students who arrive with the most advantages often receive the most resources.
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Matt Barnum @mattbarnum.bsky.social · 18/08/2026
fair point and I'll take the hit on the image
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Jesse Rothstein @jrothst.bsky.social · 18/08/2026
A great article by the always-excllent @mattbarnum.bsky.social about my new study with @zbleemer.bsky.social on the "meritocratic consensus" in higher education: www.chalkbeat.org/2026/08/18/s...
chalkbeat.org
How American higher education helps the rich get richer
Higher education’s admissions hierarchy is also a spending hierarchy. The students who arrive with the most advantages often receive the most resources.
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Matt Barnum @mattbarnum.bsky.social · 18/08/2026
New- American higher education is designed so that the academically and financially rich get richer through a well-funded education. The startling scope of this unequal structure is documented in a new study by @zbleemer.bsky.social and @jrothst.bsky.social. www.chalkbeat.org/2026/08/18/s...
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Matt Barnum @mattbarnum.bsky.social · 17/08/2026
keep your eyes peeled later this week for a start on this!
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Matt Barnum @mattbarnum.bsky.social · 17/08/2026
fair enough. at the least, though, folks should stop saying (not you, but the linked piece) that lower-SAT students would be better off at community colleges. this would be convenient, but the strong weight of the evidence suggests otherwise, imo
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Matt Barnum @mattbarnum.bsky.social · 16/08/2026
but how would reinstating the SAT address the underlying issue (students struggling in math)? this would simply divert those students to other (less resourced) colleges
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Erica Meltzer @ericameltzer.bsky.social · 14/08/2026
The big swings in New York reading scores are raising questions about whether something went wrong with the test or how it's scored. As one assessment expert told Chalkbeat, people are much more eager to look under the hood of large declines than large increases. www.chalkbeat.org/newyork/2026...
chalkbeat.org
Testing experts say New York’s reading score whiplash deserves a closer look
New York celebrated a dramatic rise in elementary reading scores last year. Now much of that gain has vanished, and testing experts are asking what happened
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Matt Barnum @mattbarnum.bsky.social · 05/08/2026
it's a really nice study!
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Matt Barnum @mattbarnum.bsky.social · 05/08/2026
New: Does college pay off? This has increasingly come under question. But careful research has found that even students who weren't academic standouts in high school seem to benefit from attending a four-year college. www.chalkbeat.org/2026/08/04/w...
chalkbeat.org
The research on who benefits from college may surprise you
Studies in Florida, Georgia, Massachusetts, and Texas point in the same direction: Four-year college often helps students with modest high school records.
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Matt Barnum @mattbarnum.bsky.social · 05/08/2026
I think there is more ambiguity than this lets on about the pros/cons of some college, but I prefer looking at the net effect of "college entry" (which prices in non-completion) because you can't perfectly predict who will finish ex ante
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Reposted by Matt Barnum
Michael Petrilli @michaelpetrilli.bsky.social · 05/08/2026
This thoughtful post by @mattbarnum.bsky.social @chalkbeat.org, pushing back on my contention that students with low grades and/or test scores shouldn't go to college because they are unlikely to complete a degree, is worth a read. cbnewsletters.chalkbeat.org/p/who-should...
cbnewsletters.chalkbeat.org
Who should go to college?
Prior studies suggest that even many students who struggle in high school benefit from a four-year college education.
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Reposted by Matt Barnum
Gail Cornwall @gailcornwall.com · 04/08/2026
Another clear-eyed look at the research from @mattbarnum.bsky.social: "Who should go to college? More students may benefit than we think." www.chalkbeat.org/2026/08/04/w...
chalkbeat.org
The research on who benefits from college may surprise you
Studies in Florida, Georgia, Massachusetts, and Texas point in the same direction: Four-year college often helps students with modest high school records.
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
agreed
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
keep reading!
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
My reading of the evidence is that turnover on average is harmful so even this seemingly modest pre-pandemic rate is above the "ideal" rate. (Now maybe it would be unrealistic to reduce it to such a level as policy matter.)
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
11/11 The full piece and underlying data are here: www.chalkbeat.org/2026/07/30/t...
chalkbeat.org
A ‘lost generation’ of teachers left the classroom. Schools are still dealing with the consequences.
Veteran teachers left, principals cycled through too, and high-poverty schools likely faced the greatest strain. Here’s what years of churn did to classrooms.
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
10/ Anyway, this is why I put all the data out there. I hope other people will dig into it and come to their own conclusions, even if they differ from mine. Here's another nice response to the findings. bsky.app/profile/andr...
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
9/ None of this seems great! I agree that the problem is likely concentrated in certain places and fields (high-poverty schools, special education). See eg this data from S.C. That’s perfectly consistent with there also being a broad-based challenge.
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
8/—We know that turnover is generally harmful to student learning. —Schools have likely lost staff beyond teachers at higher-than-usual rates too, creating more instability. —Teacher pay has declined relative to pay for other professionals and teachers also don't get the remote work perk.
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
7/ This is in the eye of the beholder. I probably wouldn’t use “crisis” either—and haven’t. I’d call it a significant concern. My case:
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
6/ @chadaldeman.bsky.social isn’t convinced. In his telling, these increases are modest and are now coming back down—which is true in most, though not all, states where data is available. Chad argues that there’s no crisis here. www.chadaldeman.com/p/the-rise-a...
chadaldeman.com
The rise and fall of teacher turnover
The enduring staffing challenges are the same ones we've had all along
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
5/ My hypothesis is that a single-year increase like this is not a big deal. Multiple straight years of higher turnover are more serious because of the cumulative loss of teachers.
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
4/ That’s an increase of 2–3 percentage points, or 20%–30%. It implies 35,000 additional teacher departures from Texas public schools over five years. (Texas has a teacher workforce of about 370,000.)
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
3/ How big has the increase been?  Consider Texas, the largest state with data available. For about a decade before 2020, turnover was between 10% and 11%. For the last five years, it’s been more like 12% to 13%.
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
2/ I recently collected figures—an exhaustive and exhausting process, btw—on teacher turnover across 21 states. Nineteen have seen meaningful increases in teachers leaving since the pandemic. In most states, there have been four to five straight years of elevated turnover.
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Matt Barnum @mattbarnum.bsky.social · 04/08/2026
1/ From 2021 through 2022, I was skeptical of the emerging narrative that there was a teacher shortage/exodus crisis. I just didn’t see much data to support it. And I wrote as much. www.chalkbeat.org/2022/3/9/229... But then, to my surprise, the data started to change.
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Matt Barnum @mattbarnum.bsky.social · 31/07/2026
I didn't look at principals as systematically but I do note in the piece that there appears to have been an increase in turnover there too
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