We updated this piece on the four-day school week, originally published in June 2018, on July 15, 2024 to include new research and other information.

More than 2,100 public schools in 25 states have switched to a four-day school week, often in hopes of recruiting teachers, saving money and boosting student attendance, researchers estimate.

Small, rural schools facing significant teacher shortages have led the trend, usually choosing to take off Mondays or Fridays to give employees and students a three-day weekend every week. To make up for the lost day of instruction, school officials typically tack time onto the remaining four days.

In some places where schools made the change, school district leaders have marveled at the resulting spikes in job applications from teachers and other job seekers. Teacher shortages, made worse by the COVID-19 pandemic, have plagued public schools nationwide for decades.

“The number of teacher applications that we’ve received have gone up more than 4-fold,” Dale Herl, superintendent of the Independence, Missouri school district, told CBS News late last year.

The impact on students, however, has not been as positive. Although peer-reviewed research on the topic is limited, focusing only on a single state or small group of states, there is evidence that some groups of students learn less on a four-day schedule than on a five-day schedule.

A new analysis of student performance in six states — Colorado, Iowa, Kansas, Montana, North Dakota and Wyoming — finds that students who went to class four days a week, as a whole, made less progress in reading during the academic year than students who went five days a week. Kids on a four-day schedule earned lower reading scores on a spring assessment known as the Measures of Academic Progress Growth, on average.

However, the authors of the paper, published last month, also found that the condensed schedule had little to no effect on the rural students they studied, on average. Schools located in towns and suburbs, on the other hand, saw student performance drop considerably after adopting a four-day week.

The authors also discovered differences among student groups. For example, Hispanic students going to class four days a week made less progress in math during the school year than white students on the same schedule. White students made less progress in math than Native American students during the 11-year study.

“For policymakers and practitioners, this study addresses previous ambiguity about the effects of four-day school weeks on academic outcomes and provides evidence supporting concerns about four-day school week effects on student achievement and growth, particularly for those implemented in non-rural areas,” write the authors, Emily Morton, Paul Thompson and Megan Kuhfeld.

In the spring before the COVID-19 pandemic, a total of 662 public school districts used the schedule — up more than 600% since 1999, Thompson and Morton write in a 2021 essay for the Brookings Institution. That number climbed to 876 during the 2022-23 academic year, they told The Journalist’s Resource in email messages.

In addition to studying the schedule’s effect on student achievement, researchers are also investigating its impact on other aspects of school operations, including education spending, student discipline and employee morale. To make the research easier to find, the University of Oregon’s HEDCO Institute for Evidence-Based Educational Practice has created the Four-Day School Week Research Database.

Anyone can use the interactive platform to sift through research completed as of May 2023. It’s worth noting that most research in the database is not peer-reviewed journal articles. Seventy of the more than 100 papers are student dissertations, theses and other papers.

If you keep reading, you’ll find that we have gathered and summarized several relevant journal articles below. To date, the scholarly literature indicates:

Some schools cut instructional time when they adopt a four-day schedule.
The impact of a four-day school week differs depending on a range of factors, including the number of hours per week a school operates, how the school structures its daily schedule and the race and ethnicity of students.
The condensed schedule does not save much money, considering employee salaries and benefits make up the bulk of school expenses. In a 2021 analysis, Thompson estimates schools save 1% to 2% by shortening the school week by one day.
Staff morale improves under a four-day school week.
Fighting and bullying decline at high schools.
Both Thompson and Morton urged journalists to explain that the amount of time schools dedicate to student learning during four-day weeks makes a big difference.

“It’s pretty critical to the story that districts with longer days (who are possibly delivering equal or more instructional time to their students than they were on a five-day week) are not seeing the same negative impacts that districts with shorter days are seeing,” Morton, a researcher at the American Institutes of Research, wrote to JR in late 2023.

In a follow-up conversation with JR in July 2024, Morton pointed out that parents like the four-day schedule despite concerns raised by education scholars. In interviews with researchers, she wrote, “parents mention that they appreciate the additional family time and perceive other benefits of the schedule for their children, and they overwhelmingly indicate that they would choose to keep a four-day schedule over switching back to a five-day schedule.”

Morton would not recommend schools adopt a four-day schedule if their main aim is saving money, boosting student attendance or recruiting and retaining teachers. Research findings “do not provide much support for the argument that four-day school weeks are delivering the intended benefits,” she wrote to JR.

Keep reading to learn more. We’ll update this collection of research periodically.