Teenagers who go to bed early and sleep longer have sharper brains, study finds - The Guardian

Teenagers who go to bed early and sleep longer have sharper brains, study finds  The GuardianJust 15 minutes extra sleep could boost exam performance  The TelegraphCould longer sleep improve your child's test results?  ITVXAdolescents who sleep longer perform better at cognitive tasks  University of CambridgeJust 15 minutes’ extra sleep at night may boost children’s brains  The Times