Schools around Scotland are to be offered resources to teach teenagers how to get enough sleep.
The teaching pack created by the charity Sleep Scotland is to be used as part of the curriculum for excellence, reports the BBC.
It aims to raise awareness of the importance of sleep for young people's emotional and physical well-being.
However, going without sleep can be linked to obesity, pupils' failure to reach their potential height and a greater risk of depression.
A report by the charity said young people often believed they could make up for lack of sleep during the week by sleeping late at weekends.
However, by going to bed even later at weekends they were actually forcing a change in their body clocks - giving the same effect as jet lag when they return to a school routine on Monday mornings.