School Start Times for Middle School and High School Students — United States, 2011–12 School Year Please note: An erratum has been published for this article. To view the erratum, please click
here.
Weekly
August 7, 2015 / 64(30);809-813
Anne G. Wheaton, PhD1; Gabrielle A. Ferro, PhD1; Janet B. Croft, PhD1
Adolescents who do not get enough sleep are more likely to be overweight (
1); not engage in daily physical activity (
2); suffer from depressive symptoms (
2); engage in unhealthy risk behaviors such as drinking, smoking tobacco, and using illicit drugs (
2); and perform poorly in school (
3).
However, insufficient sleep is common among high school students, with
less than one third of U.S. high school students sleeping at least 8
hours on school nights (
4). In a policy statement published in
2014, the American Academy of Pediatrics (AAP) urged middle and high
schools to modify start times as a means to enable students to get
adequate sleep and improve their health, safety, academic performance,
and quality of life (
5). AAP recommended that "middle and high schools should aim for a starting time of no earlier than 8:30 a.m." (
5).
To assess state-specific distributions of public middle and high school
start times and establish a pre-recommendation baseline, CDC and the
U.S. Department of Education analyzed data from the 2011–12 Schools and
Staffing Survey (SASS). Among an estimated 39,700 public middle, high,
and combined schools* in the United States, the average start time was
8:03 a.m. Overall, only 17.7% of these public schools started school at
8:30 a.m. or later. The percentage of schools with 8:30 a.m. or later
start times varied greatly by state, ranging from 0% in Hawaii,
Mississippi, and Wyoming to more than three quarters of schools in
Alaska (76.8%) and North Dakota (78.5%). A school system start time
policy of 8:30 a.m. or later provides teenage students the opportunity
to achieve the 8.5–9.5 hours of sleep recommended by AAP (
5) and the 8–10 hours recommended by the National Sleep Foundation (
6)...
http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6430a1.htm?s_cid=mm6430a1_e