Watching TV on school night bad for grades

Parents now have science to back them up when they say, “Turn off the TV. It’s a school night.”

Middle school students who watch TV or play video games during the week do worse in school, a new study finds, but weekend viewing and gaming doesn’t affect school performance much.

[Read](http://www.msnbc.msn.com/id/15105253/ “Read the Story”) (AP via MSNBC)