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Posts by Thomas S. Dee

I wish I could be as sanguine as Matt & Robert. IMHO, high-quality, causal inference still occupies small, contested spaces in ed schools. The larger field has produced too few evidence-based insights relevant to policy & practice. And other professional schools differ in mixing rigor & advocacy.

1 day ago 11 0 1 1

Quantitative research in education is scandalously bad

2 days ago 88 8 23 15
Flyer for "Safe to Learn" congressional briefing

Flyer for "Safe to Learn" congressional briefing

I'm pleased to be in DC today to speak at a congressional briefing on safe and supportive school environments and particularly to underscore the research on how recent immigration raids are influencing students and schools.

4 days ago 2 0 0 0
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Yes. A *highly* controversial 2014 reform effectively required all students to wait until 9th grade to take Algebra with the reasoning based on equity concerns and claims about the deleterious effects of acceleration. The results were as you might expect (tom-dee.github.io/files/ER_202...).

3 weeks ago 1 0 1 0

However, I still see these early results as a cause for some celebration—and an example of the underappreciated power of reforms that raise student expectations and expand access to rich academic content.

3 weeks ago 9 0 0 0

There are multiple challenges ahead as San Francisco moves to scale up 8th grade access to Algebra, particularly with respect to promoting Algebra readiness among historically underserved students.

3 weeks ago 6 0 1 0
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Students who took Algebra as an additional math class (AMC) experienced substantial learning gains while students at "Algebra for All" sites skipped Math 8 without clear academic harm.

3 weeks ago 13 0 1 0
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San Francisco Killed 8th-Grade Algebra. Now It’s Set to Come Back.

In the last school year, after years of controversy, San Francisco schools fielded pilots that reintroduced Algebra to 8th grade. A preregistered, quasi-experimental study by Elizabeth Huffaker and me indicates the major pilots were largely successful.
www.nytimes.com/2026/03/24/u...

3 weeks ago 51 8 1 5

The steep ⬇️ in U.S. public school enrollment during the pandemic has not reversed, SIEPR's @tomdee.bsky.social tells @theguardian.com in a fascinating story about the difficult. choices cash-strapped schools now face. "There are no free lunches," Dee says. Link 👇

#PublicEducation #EduSky

1 month ago 1 1 1 0

I had to read this from the state superintendent twice:

“Well, it’s not fraud. Most of it is just mistakes”

Talk about the soft bigotry of low expectations.

1 month ago 35 2 3 0
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Perry: The learning loss from the ‘ICE pandemic’ "As Trump’s virus lurked around Minnesota schools looking to kidnap children and their parents, many children quite reasonably went into hiding," David M. Perry writes.

I spoke with The Minnesota Star Tribune about the research evidence, mine and others, which indicates the many ways in which aggressive immigration enforcement harms children, schools, and communities.

www.startribune.com/coronavirus-...

1 month ago 2 3 0 0
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Accelerating Opportunity: The Effects of Instructionally Supported Detracking - Thomas S. Dee, Elizabeth Huffaker, 2026 The pivotal role of algebra in the educational trajectories of U.S. students continues to motivate high-profile policies focused on when students access the cou...

Glad to see @tomdee.bsky.social and Elizabeth Huffaker's work on accelerating opportunity in Algebra I out of the working papers and into @aeraedresearch.bsky.social!

doi.org/10.3102/0002...

2 months ago 15 7 1 1

FWIW, the detracking debate makes me crave a deeper discussion about the modal "college for all" design of high schools and the potential for design-forward alternatives that provide flexible, equitable access to different college & career pathways.

2 months ago 1 0 0 0
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📢 Call for papers:

CESifo Area Conference on Economics of Education
co-organized w/ Eric Hanushek (Stanford)

🏛️ 11-12 Sept 2026, Munich

🧑‍🏫 Keynote: John List (Chicago) @johnlist.bsky.social

👉 www.ifo.de/en/cesifo/ev...

⏰ Deadline: 11 May 2026

🖼️ Past programs:
sites.google.com/view/woessma...

2 months ago 39 27 1 3

For context, this drop in attendance rates related to the measles outbreak (about 93% to 90%) is almost as large as the initial drop in TX attendance rates from pre-pandemic to post-pandemic (95% in 2018-19 to 91% in 2021-22).

(TX attendance trends over time here: www.aei.org/research-pro...)

4 months ago 4 6 2 0

In 2000, measles was declared eradicated in the U.S. Today, declining child-vaccination rates are driving the largest measles resurgence we've seen in 3+ decades. How do these outbreaks impact schooling? @tomdee.bsky.social and I examine this question in West Texas, the country's largest outbreak.

4 months ago 5 1 1 1
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Our preregistered study of mental-health co-responders—now out in Nature Human Behaviour (doi.org/10.1038/s415...) —finds positive benefits in terms of significant reductions in psychiatric detentions and future mental-health crises relative to police-only responses.

5 months ago 3 0 0 0
PNAS Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

Thanks. FYI, my study came out last week in @pnas.org and is open access: doi.org/10.1073/pnas...

5 months ago 1 0 0 0
PNAS Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

Open access is available here: doi.org/10.1073/pnas....

5 months ago 3 0 0 0
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The aggressive immigration raids we now see across the nation began 10 months ago in California's Central Valley. Their impact on children, families, and communities is an important & active area of research

I'm pleased my study of the initial raid's early impact on students is now out in @pnas.org

5 months ago 28 15 1 2

👍 but I think it's far less difficult (and constraining of discovery) than some people think. For example, it's simple enough to preregister a "decision tree" of research designs to be informed by robustness checks.

The key thing is to create transparency to support sense-making of study results

5 months ago 2 0 0 0
Sage Journals: Discover world-class research Subscription and open access journals from Sage, the world's leading independent academic publisher.

Empirical evidence and conceptual reasoning suggest quasi-experimental studies—the most common form of studies making causal claims—have a "p-hacking" problem.

My essay on this and the case for adapting & adopting QED preregistration is now published in Evaluation Review.

doi.org/10.1177/0193...

5 months ago 10 4 1 0
Lecture photo, credit: Eric Patashnik

Lecture photo, credit: Eric Patashnik

Such a warm, engaging, and informative visit! My thanks to the @annenberginstitute.bsky.social at Brown University for inviting me to give the Annenberg 2025 Distinguished Lecture.

5 months ago 5 0 0 0
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High Quality Research Rarely Informs Classroom Practice. Why? (Opinion) The connection between education research, policy, and practice is broken. Here’s what it would take to fix it.

Not sure but always happy to connect! I plan to stress some of the aligned ideas in this recent @edweek.org #K12BigIdeas essay👇 and your recent book! (www.amazon.com/rethinking-c...).

www.edweek.org/leadership/o...

6 months ago 1 0 1 0

I'm honored to give the Annenberg 2025 Distinguished Lecture next week and looking forward to being in conversation with this outstanding community.

6 months ago 7 0 1 0
Apply for Admission | Stanford Graduate School of Education As you prepare your application, familiarize yourself with the admission process and timeline for your desired program below. Note that the application for 2026-2027 entry is not yet available.

Know any aspiring PhD students interested in quant studies in education? Please direct them to our programs in ed policy, econ of ed, or ed data science! I hope to welcome an energetic & ambitious student to join me in our new building 🌴☀️
Applications due November 17
ed.stanford.edu/admissions/a...

6 months ago 2 2 0 0
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🚨Do you know a school, system, or network doing amazing work in support of student success in high school, particularly through a continuous-improvement approach?

Let's recognize them! Encourage them to apply for the Carnegie Award for Impact (cfdn.at/4o4gp58).
Applications due on November 10.

6 months ago 3 2 0 0

I have watched states delay releasing test scores for months as they work to message results and hope no one is paying attention.

7 months ago 4 1 0 0
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Teachers sue over Trump's immigration crackdown, saying students are staying home Labor unions representing educators and school employees are suing President Donald Trump’s administration over its immigration crackdown

It's gratifying to see my recent immigration-raid research actually being used.
wapo.st/42mWdTn

7 months ago 25 9 0 0
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High Quality Research Rarely Informs Classroom Practice. Why? (Opinion) The connection between education research, policy, and practice is broken. Here’s what it would take to fix it.

"Educators should also understand the limitations of research evidence. Rigorous impact evaluations...can only tell us what has worked someplace at some time—not what will work universally for educators facing specific challenges." - @tomdee.bsky.social
www.edweek.org/leadership/o...

7 months ago 6 2 0 0