my child is 21 months,as rightly sail childen copy things happening around..its always happened that children around him have beaten him, scratched him, and also taken away his toys by snatching , now he throws the frustration in this manner......
I've always been told that when kids are really young and something happens at school, let the school deal with the punishment and you deal with things that happen at home. Goodluck.
This is tough. YOu have to punsih him very soon after the incident. How old is the child? Is something or someone bothering him in class? DId the behavior just start? I would talk tto the teacher and ask for some suggestions.