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Later start times lead to fewer disciplinary issues. 3

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Those who slept eight or more hours each night were significantly less likely to fall asleep in class. (4)

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Absences, tardiness and sleepiness in school had significantly declined with later start times and that students, moods had improved. 4

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Later school start times could leave some kids walking home in the dark. (2)

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Implement later start time could cause rearranged bus schedules and younger children may have to take an earlier bus to school when it may be dark. (4)

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As a result of biological changes in teenagers, the average teenager cannot fall asleep until 11: 00 p.m. and would do best waking up  at 8: 00 a.m. or ever later. 3

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Later  school start times would leave teens with fewer hours for after school activities and homework.2

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A later school start time helps accommodate this biological need. Overall care for sleep hygiene such as having a good nights sleep and following back to school sleep tips can also help adolescents regulate their sleep 3.

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Later start times could negatively effect athletic schedules that may result in students missing part of a class at the end of the day. 4

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Early start times can lead to an increasing of depressive symptoms and suicidal ideation. 3

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We found significant decreases in absences and tardiness in all grades 9-12 in the school districts that had instituted the latest school start times of 8:35 and 8:55 a.m.-in one district,there was a 66%drop in tardiness.(4)

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Lack of sleep can lead to an increased likelihood for participating  in risk-taking behaviors such bullying and fighting. 3

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If school started later districts would have to reschedule school buses and perhaps pay for more of them. 2

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Teens  are biologically wired to fall asleep later at night. as a result some students may get as few as five hours of sleep before they need to be up for their first class. 2

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We also found that students who participate in clubs or other organized activities, or work at jobs for pay, are significantly more likely to get less than 8 hours of sleep. (4)

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Implementing a later start time in their schools could make it more difficult to arrange child care for younger children before and after school may be more difficult.
(4)

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Cigarette, alcohol,and marijuana use declined by 8% to 14% when teens slept eight or more hours each night,with depression and sexual activity  also declining by 9% to 11%.
(4)

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Later start times led to a decline of motor vehicle crashes. One study showed a 16.5% decrease in the teenage crash rate after the school start time was pushed back one hour.  3

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Teens need about 9.25 hours of sleep each night.
(4)

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Depression, obesity, substance use and abuse, and increased car crashes are just some of the serious consequences of early start times. (4)

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Poor quantity and quality of sleep can lead to health concerns such as diabetes, cardiovascular disease, and obesity.(3)

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Later start times lead to decreased tardiness.(3)

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A person who is sleep -deprived has reduced reaction times,slower eye movements,and decreased ability to make quick decisions.
Sleep-deprived teen drivers are not only a danger to themselves but also a danger to anyone who shares the road with them.(4)

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Fewer occurrences of falling asleep in class.

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Those who slept eight or more hours each night were significantly less likely to report symptoms of depression.(4)

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Early start times lead to increased risk of motor vehicle accidents.
(3)

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Later school start times improved attendance at school.(3)

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Students with less sleep have difficulty paying attention in class and are likely to have lower grades and may also experience irritability and fatigue. 3

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Later start time will likey mean more busses on the road later in the day; this could create more traffic and increase travel delays. 3

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Scheduling conflicts resulting in later start time may arise for athletic and academic competitions against schools with earlier start times and therefore an earlier dismissal. 3

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According to the sleep foundation, nearly 60 percent of middle school students and more than 70 percent of high school students in the u.s aren't getting the recommended 8.5 to 9.5 hours of sleep at night. 2

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Later school start times support the biological needs of adolescents.(3)

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Early start times lead to a greater chance of unhealthy behaviors and drug use and tobacco smoking. 3

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Teens need at least 8.5 hours of sleep at night to be healthy. (1)

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Later start times lead to reduced irritability and depressive symptoms. (3)

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Later school start times result in better student grades (2).

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According to the National Sleep Foundation children ages 6-13 need between 9 and 11 hours of sleep at night. Teenagers (ages 14 -17) need 8-10 hours each night .However, studies have demonstrated that most American adolescents are not getting enough sleep. Nearly 60% of middle schoolers do not get enough sleep on school nights.For high schoolers, that number is over 70%. (3)

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Studies show that tired teens have an increased risk of depression, anxiety, obesity, and illness. (1)

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If schools start later, teens will go to bed later. (1)

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Teens need to practice being on time and managing their sleep schedule. (1)

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Parents cannot drive their children to school if school starts later. (1)

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Later school start times mean transportation challenges. (1)

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Later school start times mean less time for after school activities and family. (1)

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Starting school later means later dismissal. (1)

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Well rested kids learn better. (1)

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Students are less tardy when school starts later. (1)

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Students are more alert when school starts later. (1)

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It becomes physically harder to go to sleep early as teens. (1)

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Homework, afterschool jobs, and extracurricular activities keep teens up late. (1)

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70% of teens are not getting enough sleep. (1)