Students completing homework (IMAGE) National Jewish Health Caption Teenagers are not biologically meant to rise early, but most middle and high schools still start their day before 8:30 a.m. A new study by National Jewish Health explored how school start times affect the whole family and found that parents get more sleep when middle and high schools start about an hour later. Credit National Jewish Health Usage Restrictions All multimedia is available for free and unrestricted media use with courtesy to National Jewish Health License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.