Recently, I came across a fascinating paper from Matthew Kraft of Brown University and Sarah Novicoff of Stanford University about the relationship between instructional time and learning. The authors, based on their own study and literature review, found that additional total time in school and instructional time had a clear positive effect on student achievement.
The authors note that how time is used matters, as it can be difficult to convert total scheduled hours into actual instructional hours. The amount of time at recess, the use of substitute teachers, snow days, etc., all can have an impact on student learning and diminish instructional time.
In their case study of the Providence Public School District in Rhode Island, Kraft and Novicoff estimate that elementary school students lose 16 percent of their instructional time, middle school students lose 21 percent, and high school students lose 25 percent. They observe that unexcused student absences account for the largest portion of the lost time (Missouri has a serious chronic absenteeism problem), but outside interruptions and teacher absences also have an impact.
The authors note that “most school systems which (sic) substantially increase total time are able to convert this additional time into at least small gains in academic achievement.” Essentially, even if the time is used poorly, there are gains to be made just by scheduling more hours in school.
In the paper, which uses national 2017–2018 statistics, Missouri ranked 46th in average number of instructional days and 24th in average number of instructional hours. It must be noted that these were our rankings prior to the passage of Senate Bill 743 in 2018, which removed the requirement for a minimum number of school days starting in the 2019–2020 school year. That was the same year the COVID-19 pandemic broke out—leaving in its wake an immense loss in instructional time, and a need to catch up.
Rather than increasing time to make up for the lost hours, Missouri schools have decreased hours—between 20-30 fewer hours per year on average. This is a small decrease, but it’s a puzzling decision given how much COVID set students back.
Test scores have been decreasing over the last three years as well. In 2019, 39% of Missouri 4th graders scored proficient or higher on the math portion of the National Assessment of Educational Progress (NAEP) and 34% scored proficient or higher in reading. In 2022, these numbers dropped to 34% and 30%, respectively. Missouri 8th graders fared no better, dropping from 32% in math and 33% in reading to 24% and 28%.
Similarly, on the Missouri Assessment Program (MAP), Missouri 4th and 8th graders have failed to bounce back from the pandemic drop. In fact, English/language arts scores are actually lower than the post-COVID year (2020-2021). In the 2021–2022 school year, 46% and 49% of Missouri 4th and 8th graders, respectively, scored above proficient. In the 2022–2023 school year, those scores fell to 43% for 4th graders and 46% for 8th graders.
Missouri students are losing out on instructional time, and our test scores are falling. There may be several reasons why scores are declining, but less time learning seems to be at least part of it. The evidence from scholars such as Kraft and Novicoff—along with common sense—makes it clear that kids are going to learn less if they have less instructional time.
Our students should be going to school more, not less.
