Impact of Changing School Start Times on Teacher Sleep Health and Daytime Functioning.

BACKGROUND: The benefits of delaying school start times for secondary students are well-established. However, no previous study has considered how changing school start times impacts sleep and daytime functioning for K-12 teachers. METHODS: Teachers in a large suburban school district completed 3 annual surveys (pre-change n = 1687, post-change n = 1857, follow-up n = 1812) assessing sleep and daytime functioning. RESULTS: With delayed start times, high school teachers had later rise times (high school [HS]: 28 minutes, middle school [MS]: 14 minutes), increased sleep duration (HS: 22 minutes, MS: 13 minutes), and improved daytime functioning. Improvements for middle school teachers were noted but were not statistically significant. With earlier start times, elementary teachers reported earlier bedtimes (9 minutes) and wake times (9 minutes), with no changes in sleep duration or daytime functioning. IMPLICATIONS FOR SCHOOL HEALTH POLICY, PRACTICE, AND EQUITY: Today's school health policies often focus on wellness. Findings from this study reveal that the policy of healthy school start times can have a significant, positive impact on adults who teach in later-starting secondary schools. Later school start times for secondary teachers provide greater parity with their elementary colleagues in terms of sleep opportunity. CONCLUSIONS: This study extends previous findings on how the policy of later secondary school start times improves the health and well-being of adolescents, highlighting that healthy start times contribute to increased sleep opportunity for MS and HS teachers and improved daytime functioning for HS teachers, with changed start times having no significant negative effect on elementary school teachers.

Drowsy driving and teen motor vehicle crashes: Impact of changing school start times.

INTRODUCTION: Motor vehicle crashes (MVC) are the second leading cause of death for adolescents in the United States, with drowsy driving a major contributing factor. Early school start times have been identified as a significant factor that reduces adolescent sleep duration, which in turn contributes to drowsy driving and MVC. This paper examined the longitudinal impact of delaying secondary school start times on self-reported student drowsy driving and teen MVC. METHODS: Secondary school students (10th and 11th grade, 51.7% female, 67.8% White) in the United States completed annual surveys 1 year before and 2 years after implementation of later school start times (70-min delay, n range 1642-2452 per year), reporting frequency of drowsy driving (less than once/week vs. at least once/week). Teen (16-18 years) MVC data from the Colorado Department of Transportation for the 2 years before and 2 years after later start time implementation were compared for Arapahoe County (where start times changed) and neighboring Adams County and Douglas County (where start times did not change). RESULTS: With later start times, there was a significant drop in the percent of students who reported frequent drowsy driving (pre-change: 32.6%, post-change: 21.9%, follow-up: 22.8%). Weekday teen MVC rates went down in Arapahoe County (p = .04) during the school year, while no change or increases in MVC rates were seen in neighboring counties. CONCLUSIONS: Healthy school start times are important for adolescent health and safety, with study findings highlighting the downstream effects of increased sleep duration following a 70-min delay in secondary school start times on adolescent drowsy driving and teen MVC rates.

Biology vs. ecology: a longitudinal examination of sleep, development, and a change in school start times.

BACKGROUND: Secondary school start times are associated with student sleep and daytime functioning; however, no study examining this association has included linked longitudinal data for both primary and secondary students. To understand the interplay between biology (ie, normal developmental changes in sleep) and ecology (ie, school start times), this study examined sleep and daytime functioning in elementary/primary and secondary school students over a three-year period that included changes to school start times. METHODS: Students (grades 3-10, n = 6168) and parents (for student grades Kindergarten-2, n = 2772) completed annual surveys before (pre-change) and for two-years after (post-change, follow-up) implementation of new school start times (elementary/primary: 60 min earlier, secondary: 50-80 min later). Participants were 48.9% female, 65.5% White, and 16.2% qualified for free/reduced lunch. RESULTS: With new school start times, significant changes were found for weekday wake times and sleep duration; elementary/primary students woke earlier (23 min) and obtained less sleep (14 min), while secondary students woke later (44 min) and obtained more sleep (31 min). Small changes in weekend sleep duration (<7 min) were found across levels. Secondary school students had significant improvements in daytime functioning post-change, due in part to changes in sleep duration. Minimal changes in elementary/primary students' daytime functioning was found, despite shorter sleep duration. CONCLUSIONS: School start times are a significant factor in weekday wake times for students across grade levels, while later bedtimes are more a factor of normal development. Later start times positively affected secondary students' daytime functioning, with non-significant findings for earlier elementary/primary start times.

Impact of changing school start times on parent sleep.

OBJECTIVE: To examine the impact of changing school start times on sleep in parents of students in elementary, middle, and high school. METHODS: Annual surveys were completed by parents of K-12 students (n = 8190-10,592 per year) before (pre-change) and for 2 years (post-change, follow-up) after implementation of new school start times (elementary school [ES]: 60 minutes earlier, middle school [MS]: 40-60 minutes later, high school [HS]: 70 minutes later), providing parent self-reported weekday bedtime and wake time, sleep quality, and feeling tired. RESULTS: Significant level-by-year interactions were found for parent bedtime, wake time, and sleep duration (all p < .0001). Post hoc analyses show ES parents reporting earlier bedtimes and wake times at post-change, with no change in sleep duration, while MS and HS parents reported later post-change wake times. Post-change, more MS and HS parents reported sufficient sleep duration (p < .0001) and good sleep quality (p < .0001), with fewer HS parents reporting feeling tired (p < .0001). CONCLUSIONS: This is the first study to consider the impact of a policy change aimed at improving child sleep on parent sleep. Healthy school start times has a significantly positive downstream effect on secondary school parents' sleep and daytime functioning, with minimal impact reported by parents of elementary school students.

Changing school start times: impact on sleep in primary and secondary school students.

STUDY OBJECTIVES: To examine the impact of changing school start times on sleep for primary (elementary school: ES) and secondary (middle and high school: MS/HS) students. METHODS: Students (grades 3-12) and parents (grades K-12) were surveyed annually, before and for 2 years after school start time changes (ES: 60 min earlier, MS: 40-60 min later; HS: 70 min later). Student sleep and daytime sleepiness were measured with school-administered student surveys and parent-proxy online surveys. RESULTS: Approximately 28,000 students annually completed surveys (~55% White, ~21% free/reduced lunch [FRL]). One-year post-change, weekday bedtimes and wake times were slightly earlier for ES students, with an 11-min decrease in sleep duration. MS and HS students reported slightly later weekday bedtimes, significantly later wake times, and significantly longer sleep duration (MS: 29 min; HS: 45 min). The percent of ES students reporting sufficient sleep duration, poor sleep quality, or daytime sleepiness did not change, but the percent of MS and HS students reporting sufficient sleep duration significantly increased and clinically significant daytime sleepiness decreased. All results were maintained at the 2-year follow-up. Benefits of later start times were similar across racial and free/reduced lunch groups. CONCLUSIONS: This is the first large scale, longitudinal, and representative study to concurrently examine the impact of changing school start times across students in primary/secondary school. Findings suggest a minimal impact of earlier start times on ES students' sleep or daytime sleepiness, while further supporting the significant benefits of delaying MS and HS start times on student sleep and daytime sleepiness.

Engaging the community in the process of changing school start times: experience of the Cherry Creek School District.

Despite growing evidence of the positive impact of later school start times on adolescent health and academic outcomes, relatively few districts have changed start times due to concerns about transportation, child care, and athletics/extracurricular activities. This paper provides a case study of the Cherry Creek School District's (CCSD) successful efforts to change start times. The CCSD is a diverse district with an enrollment of almost 55,000 students in suburban Denver. As part of CCSD's strategic plan, a multi-disciplinary task force was formed to examine the impact of start times on student achievement, and recommend a start time schedule driven by best practices on adolescent sleep patterns, balanced with family and community needs. Over 18 months the task force's work included engaging the community through meetings, as well as conducting a large survey (n = 24,574) of parents, teachers, and students, and gathering online feedback. An iterative process utilized feedback at every stage to refine the final recommendation given to the Board of Education. Survey results, implementation considerations, outcome evaluation plans, and lessons learned are discussed.