Don't feel bad, it happens to the best of teachers. I spent the first 7 of my 35 years in education in the classroom. I can tell you that you have to establish who is boss from "Day 1" or else the students will take over. It doesn't matter whether the students are 5 or 15 they will test your limits at all times. Acting out by students is a lack of respect for the teacher. However, you can't demand respect, you have to earn it. Unfortunately, administrators will often evaluate a teacher based on classroom discipline regardless of teaching ability. I have witnessed excellent teachers fired for lack of discipline and mediocre teachers given tenure because their classrooms were "quiet". If you have a mentor go to him or her and ask for some advice.
Lord High Keeper of the Knowledge of Right and Wrong, Counselor in Moments of Temptation, and Guide along the Straight and Narrow Path and Oldest Active DWT/WDW Radio Member
DL: 1955* (1) WDW: 1977* (2), 1980* (2), 1985* (3), 1989* (3), 1996 (ASMu-3), 1999 (ASMo-3), 2000 (ASMu-2/PO-2), 2001 (ASMu-5), 2002 (ASMu-5), 2003 (ASMo-5), 2004* (8), 2004 (ASMo-8), 2005 (PC-10), 2006* (15), 2007* (20), 2008* (22), 2009* (26) 2010* (27) 2011* (32) 2012* (39) 2013* (36) 2013* (15) Total Days @ Parks = 294
*Off Property