The first school has signed up to an Oxford University trial to test if starting lessons at 10am boosts exam results.
The school in Bolton is taking part in the sleep study launching in September next year, while an Oxfordshire school is considering joining the trial.
It is the first of its kind in the UK and would see Year 10 and 11 pupils start lessons an hour later to see if their GCSE grades rise.
Oxford University sleep expert Christopher Harvey said: “During adolescence our biological clock changes so teenagers are biologically predisposed to sleep later and stay up later.
“Starting at 9am their body clocks are not optimised for learning. It kicks in at about 10am when pupils are more able to take in information.”
In total more than 30,000 pupils from 100 schools across England are to join the Teensleep project.
It is the largest ever study to look at delayed school start times on results and will run for two years.
It will also look at sleep education and what effect teaching pupils about sleep patterns could have.
One Eynsham school is considering joining the trial, as well as at least eight others across the UK.
The 100 schools need to be signed up by next July.
They would then be split into four groups; those trialling the delayed start time, sleep education, both, or neither.
Sleep education would involve five lessons teaching pupils the science and biology of sleep and how to get the best out of when to go to sleep and how long to sleep for.
Dr Harvey, based in South Parks Road, added: “Teaching this could help them become more resilient psychologically during periods of transition in early adulthood .
“We have some pilot data from a school in the south east which shows if you delay start times results actually improve.
“A lot of the data that backs this up is from the US, but the issue with the US is their schools start very early; from 6.30am to 8.30am, so their delayed starts were 8.30am or 9.30am.”
About 20 researchers and sleep experts are running the Oxford project, funded by the Wellcome Trust and Education Endowment Fund, and involving York University and Durham University.
Estimated optimum times for people in their:
9.30am – wake-up
Midday – start work
5pm – exercise
8pm – stop work
1am – sleep
7.50am – wake-up
10.20am – start work
3.30pm – exercise
6.20pm – stop work
11.30am – sleep
6.30am – wake up
8am – exercise
9am – start work
5pm – finish work
10pm – sleep
But Dr Harvey pointed out that there is always variation in these patterns, and ideally we should sleep, wake up and work within our own rhythm.