Texas study finds four-day weeks can help staffing, with key caveats

A new Texas working paper adds an important wrinkle to the fast-growing debate over four-day school weeks: in this state, districts that moved to a four-day calendar appear to have improved teacher retention and hired stronger incoming teachers on average, without posting overall losses in math or reading scores. But that average masks a sharp warning. Student achievement did fall in districts that ended up with the fewest instructional minutes after the switch and in districts that had weaker accountability records before adoption. (edworkingpapers.com)

The paper, The Effects of Four-Day School Weeks in Texas, was posted on EdWorkingPapers in October 2026 by UC Berkeley researchers Gabrielle Lohner and Justine Weng. Using a staggered difference-in-differences design with a propensity-score-matched control group, the authors estimate that teachers in adopting districts were 2.1 percentage points more likely to remain in the same district the next year. That gain came mostly from reducing moves to other districts, not from reducing exits from teaching altogether. The same districts also recruited teachers with higher measured value-added, more experience, and a higher likelihood of holding a master’s degree. (edworkingpapers.com)

For district leaders, that is the most practically useful part of the finding. In a labor market where small staffing shifts can determine whether schools open fully staffed in August, a two-point retention gain is not trivial. But the mechanism matters: if a four-day week mostly keeps teachers from moving to a neighboring district, then the policy may function less as a statewide supply fix than as a local competitive advantage. One district’s retention win can become another district’s vacancy problem. That is a more realistic frame for boards weighing calendar changes than the broader claim that four-day weeks solve teacher shortages. (edworkingpapers.com)

A staffing strategy that rests on calendar design

Texas is a particularly relevant place to test that idea because the state’s school-calendar rules make condensed schedules possible. Under Texas law, districts generally must provide at least 75,600 minutes of operation in a school year, rather than meet a 180-day requirement. A University of Houston descriptive study of Texas adopters found four-day-week districts were mostly small and rural and often used the off day for professional development or collaborative planning, suggesting the schedule is often pitched to teachers as a working-conditions improvement as much as a student-calendar change. (texas.public.law)

That helps explain why the Texas paper found stronger staffing effects than some earlier research elsewhere. A 2024 CALDER study in Colorado found small negative or statistically insignificant effects on teacher recruitment and retention, while a 2025 CALDER working paper in Missouri found no evidence that adopting a four-day week improved teacher recruitment or retention there. The Texas findings do not erase that mixed record, but they do suggest the policy can work differently in a state where many districts are small, rural, and competing intensely with one another for teachers. (caldercenter.org)

The academic caveat is the real story

The headline result on achievement is easy to oversimplify. Lohner and Weng did not find that four-day weeks are harmless in all forms. They found no overall negative effect on standardized math or reading scores on average across adopting Texas districts. But when they looked at how districts implemented the policy and what kind of systems were adopting it, the picture changed: districts with the fewest post-adoption instructional minutes saw negative achievement effects, and so did districts with lower accountability scores before adoption. In the paper, the authors use those earlier accountability scores as a proxy for district quality. (edworkingpapers.com)

That caveat is what superintendents and school boards should linger on. The practical question is not simply whether a district can compress five days into four on paper. It is whether leaders can preserve enough usable learning time, redesign transportation and staffing without fraying attendance, and keep intervention blocks, tutoring, and special-program logistics from eroding. A district with stronger operations may be better able to do that. A district already struggling with curriculum coherence, staffing instability, or weak accountability performance may find that the same calendar change becomes one more implementation burden. That causal explanation is an inference rather than a direct test in the paper, but it fits the pattern the authors report. (edworkingpapers.com)

The broader research base makes that warning credible. A 2023 multi-state student-level study by Emily Morton, Paul Thompson, and Megan Kuhfeld found negative average effects of four-day schedules on spring reading achievement and on fall-to-spring gains in math and reading, with larger harms in non-rural schools. Taken together with the new Texas paper, the emerging lesson is not that prior concerns were overblown. It is that calendar compression appears highly sensitive to context, especially how much learning time districts protect and how much implementation capacity they bring to the shift. (edworkingpapers.com)

What readers should and should not change

Readers should be careful not to treat this paper as a blanket green light. EdWorkingPapers says papers on its platform are circulated before publication for comment and discussion and have not gone through peer review. And although the research design here is stronger than a simple before-and-after comparison, districts still choose whether to adopt a four-day week; this is not a randomized experiment. The paper offers serious evidence, not a final verdict. (edworkingpapers.com)

Still, the study does sharpen the decision for practitioners. If a district is considering a four-day week mainly as a recruitment and retention tool, the Texas evidence suggests that strategy can pay off. But the same evidence says leaders should not assume staffing gains automatically make the academic tradeoff safe. Protecting minutes appears crucial, and so does district capacity. In other words, the strongest argument coming out of this paper is not that four-day weeks are good or bad in the abstract. It is that they are an operational bet: potentially useful in tight labor markets, potentially costly when districts trim time too far or lack the systems to execute the change well. (edworkingpapers.com)

That leaves a concrete next question for Texas and other states: whether the districts now adopting four-day calendars can hold onto the staffing gains without drifting downward on instructional time or achievement as the novelty wears off. The boards that get the most from this paper are likely to be the ones that stop asking Can we do four days and start asking Exactly how would we protect learning if we did. (edworkingpapers.com)