I'm a 1st year Kindergarten teacher. I'm at my wits end tryign to figure out what to do with my class. They are super mean to each other. In the past week alone I have gotten two reports from parents that students are choking and hitting their child. One incident happened at recess the other happened on the bus. Two different students in my class are doing the hittind and choking. I feel terrible that this is happening. They also argue with each other constantly, stick their tongues out, push and shove and talk about "someone stole something from me" when they never actually saw anyone do anything. I've seen hitting and kicking in line as well. When I ask why, the student who was doing replies "Well they did it to me first." I have said several times that just because someone does it to you does not mean you do it back otherwise you get in trouble too, but that message does not seem to be working. I deal with all issues I see in the classroom, but the behavior still continue. I do not understand where this agressive behavior is coming from. What am I doing wrong?