My soon-to-be 5 year old attends a voluntary pre-kindergarten program. Her teacher has called and sent home notes because she says my child and two other girls (who all got along at the beginning of year)are being mean to each other. They will pair up each day and leave the third one out. This results in crying and hurt feelings. Also, she says my child will not always let others play with her or sit beside her. I have tried talking to her about being nice to classmates and how her behavior hurts others but behavior still continues. When negative note comes home, she is sent to room for time-out but this does not phase her. Any suggestions? My child loves school and her friends so I do not understand why she behaves this way at times. She can be very stubborn when she wants.