text: is there any corrilation between time school stars and grades in teenagers?   i believe that schools should not start prior to 9:00 am. it is proven that teenagers are not morning people. my daughter is up at five am to get to school by 7:00 am. way too early. start late, end late. give them time for more sleep. i bet if late start schedules were tried for at least five years it could be ascertained that grades and attitudes would improve.