Teenagers suffer from erratic body clock issues because of early school timings, which affects their mood, says a new study.
Scientists have claimed that changing when the school day begins can perk up a teen's mood, benefit their health and enhance their ability to learn.
With the beginning of puberty, a teenager's body clock is shifted to 11:00 p.m. as sleep time.
When schools starts early and are coupled with a teen's biological clock, the result is chronic sleep-deprivation, and low grades and health problems.
Academics also contest that whereas a late start in school increased potential of students, there is no such comparable research that proves early start is beneficial.
The research was published in journal Learning, Media and Technology.