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Scheduling conflicts. These may arise for athletic and academic competitions against schools with earlier times and therefore an earlier dismissal. This means students will have to make up the work on their own time. (3)

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3) Benefits of later start times include decreased tardiness

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After the change to a later start time of car crashes in the five district studied decreased by 13%       (4)

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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 star times of 8:35 and 8:55 a.m in one districts ,there was a 66% drop in tardiness.(4)

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Benefits of later star times include  fewer occurrences of falling asleep in class(3)

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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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Medical research  has shown dramatic negative effects of sleep  deprivation, especially, in people who are  chronically  sleep deprived. Depression, obesity, substance use and abuse, and increased car crashes are just some of the serious consequences. (4)

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A sleep deprived person has trouble driving. A person who is sleep deprived has reduced  reactions times slower eyes movements and decreased ability to make quick decisions . In fact a person with fewer and than fours hours to sleep has the same driving characteristics as someone who is legally drunk a blood alcohol content of .08% sleep deprived teen drivers are not only a danger to themselves but also to danger to anyone who share the road with them (4)

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3) Benefits of later start times include better student grades

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Benefits of later start times include reduced irritability and depressive symptoms (3)

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Well-rested teens are less likely to be in car accidents or suffer from depression. 2

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Scheduling conflicts. These may arise for athletic and academic competitions against schools with earlier times and therefore an earlier dismissal and with students missing class. (3)

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Students with less sleep have difficulty paying attention in class and are likely to have lower grades .(3)

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Later school start times would leave teens with fewer hours to complete homework.  (2)

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A study found that 87.6%of those surveyed keep a cell phone in their bedroom which could easily wake them with a beep when messages come through. (4)

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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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Some families rely on older students to care for younger siblings after school; this may be more difficult if high schools dismiss later than elementary or middle school(3).

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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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Shifting school hours could also create child care problems for some parents. (2)

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High school students  also have more homework, late night technology use, and fewer parent set bedtimes all of which may cause students to stay up later than is appropriate for getting adequate sleep  (3)

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American middle and high school students often take on various extracurricular activities such as sport, clubs, and jobs which often extend into the evening hours resulting in less sleep.(3)

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Increased likelihood for participating in risk-taking behaviors,such as bullying and fighting.(3)

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They may also experience irritability and fatigue if they do not get enough sleep (3).

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Possible negative outcomes- Later start times will likely mean more busses on the road later in the day ; this could create more traffic and increase travel delays.(3)

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Other benefits of later start times include: Improved attendance at school. (3)

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Children ages 6-13 need between 9 and 11 hours of sleep at night. Teenagers (ages 14-17) need 8-10 hours each night.(3)

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Starting the school day too early can deprive teens of much-needed sleep experts say. According to the sleep Foundation ,nearly 60 percent of middle school students and more that 70 percent of high school students in the U.S aren't getting the recommended 8.5 to 9.5 hours of sleep a night. 2

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What's more , experts say , teens are biologically wired to fall asleep  later  at nigtht. As a result , some students  many get as few as five hours of sleep before they need to be up for their first class.(2).

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There's also the concern that later school start times could leave some kids walking home in the dark. (2)

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Starting classes later is expensive for school districts and limits students' time for after-school activities. 2

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Studies show that well -rested teens are more likely to get good grades. 2

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

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If schools start later parents cannot drive their children to school before work. (1)

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Starting school later causes transportation challenges. (1)

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Starting school later leaves less daylight for after school activities, like sports and family time. (1)

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Starting school later means dismissing school later. (1)

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Well-rested kids learn better when school starts later. (1)

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

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Fewer students are tardy when school starts later. (1)

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

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It is physically more difficult for teens to go to sleep early. (1)

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Homework, after school jobs, and extracurricular activities keep teens up at night. (1)

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

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