Why is Cassie still in bed?
She is sick.
She hates school. Her school starts later than most other schools.
What are the hours for Cassie's school?
7:30am to 1:00pm
9:30am to 3:00pm 1:30pm to 7:00pm
Why is the relationship between Cassie and her mother better? Her mother doesn't have to wake her up anymore.
Her school grades are much better now.
She helps her mother with house chores more now.
According to Cassie's mother, how is Cassie different now?
She studies much harder. She doesn't look tired anymore.
She is more polite and helpful.
Why did they change the start time at the school?
Because the students are lazy.
Because the students used to come late every day. Because research shows it is better for the students.
How are most students "overriding nature"? By getting up so early.
By getting up so late.
By getting too much sleep.
How is the body clock of an adolescent different from that of an adult?
It makes adolescents want to sleep earlier. It makes adolescents want to sleep later.
It makes adolescents want to sleep more.
A 7:00 am start time for a teenager is equivalent to a ___ for an adult. 4:30
What effects (from the school's later hours) do the students mention?
Using smartphone less during class. Doing more chores. Kinder in the morning.
Doing more homework.
Socializing more. Easier to concentrate.
What problem do older teenagers usually face?
Getting sick more often due to lack of sleep. Always going to school without enough sleep.
Not having enough time to sleep and study.
What effect has the school had on the students' exam results? It is still unknown.
Their grades were a little better.
Their grades were a lot better.
9:00 in the morning and Cassie is still in bed. Most schools have already started for the day. But Cassie’s school now start later, much later. It runs from half past one in the afternoon until seven in the evening. Waking up later and getting more sleep has had a dramatic impact on life at home.
I used to get really annoyed from my mom trying to wake me up. Sorry, but now she doesn't really have to. I can just do it on my own.
I don’t see her looking tired. You know even if you're dirty, you feel tired and likely you know scuffy to someone. She’s much better.
They've changed the start time at Cassie's school not because they think they're sixth formers are lazy. The decision is based on more than 20 years of research into the teenage body clock.
The cards really are stacked against them because they are overriding nature by getting up quote early in the morning in order to be on time to school.
Overriding nature? What is the science here? We asked the students to explain it.
Our body clock is located in the brain, in the hypothalamus, and specifically in the super charismatic nuclei. These stars are responsible for all our 24 hour timing systems in the human body.
In adolescence as the brain continues to grow and develop, the body clock shifts to two to three hours later.
A 7:00 start time for a teenager is equivalent to a 4:30 wake up time for an adult.
I definitely think I'm less of a classic teenager. In the mornings. I've been a lot more co-operative and a lot nicer and I'll often be helping out, and I’ll often be doing chores out of a want rather than a requirement.
In my old school timetable, I felt kind of grumpy in the morning, but then I would wear out. But now it's just I'm feeling it all around cause I've got good sleep and good quality of sleep.
I find it easier to concentrate on lessons whereas before I'd sometimes be falling asleep in the first few hours of the morning. Here, it's so much easier to concentrate and just to focus on the work that I have to do.
Schools on a day to day basis are dealing with a whole range of issues, sometimes mental health issues. I would argue there's a public health issue really in terms of a nation of teenagers, particularly older teenagers, that are going to school chronically sleep deprived.
It's too early to say if the changes here will mean students do better in their exams. But it's hoped a wider study by Oxford University will help other schools to decide whether to change their timetable. Graeme Satchell - BBC News.