Why does watching too much television cause low grades in school?

by watching Television you are being plugged into the world of entertainment. Being the lazy Americans that we are find it hard NOT to watch the next episode of jersey shore or what not. Television distracts children and teens from their social life as well as family. Don't forget it also keeps these future generations to be distracted and careless from their homework. Kids don't want to do homework they WANT TO WATCH TV. some kids may be lucky to pass test last minute and slide by but those who can't are stuck with no or late assignments which conclude that they are going to receive a bad grade. Then they are going to think twice about watching tv but even then they wouldn't be able to last.