When Demetris Payne saw a missed call from her son's junior high school, she knew something was wrong. With a sigh, the single mom of four from Shreveport, Louisiana, called back. A school official said her 13-year-old son Jadarien was suspended for three days for talking back to his teacher. She was told to pick him up right away. "Three days seems kind of harsh -- why not do in-school suspension?" Payne asked. But since Jadarien had been in trouble once before, they said he had to leave.