A study in Spain has revealed that children who sleep for more than nine hours a night achieve more academically than those getting less.
The research into six and seven-year-old pupils by the Autonomous University of Barcelona (UAB), in partnership with Ramon Llull University, found that bad sleeping habits such as going to bed late are harmful to a child's education.
The report, published in the Spanish journal Cultura y Education, found that children can have their "communication, methodological and cross-curricular skills" inhibited by lack of sleep.
Professor Ramon Cladellas, director of the study, told the BBC: "They are basic skills, meaning that if the pupil, due to a lack of sleep, develops problems in this area, it could have a repercussion on all subjects."
He said it is important that parents know the value a good night's sleep has for their children.
A US study in 2007 reported by the BBC found that children who slept more were less likely to become obese as they got older.
Posted by Theo Foulds