Well, I can't speak for everyone but I had an opportunity to teach kindergarten. The children need to know who is in charge and there is no option that they fit those shoes. When dealing with first graders one must really be organized because if you panic, they see you panic and mock the teacher's behavior.
Also, remember all the grace you received in school, meaning have a heart with tardy assignments and get them to confide in you just in case they need counseling referral and to gain trust. Seems to me they are well behaved but can get out of line if you allow them to .
I believe this experience is a progress for one to get their foot in the door as an educator and may God with be you. Also, let them remember you as a teacher they will never forget that helped them read plus had the apparel of a kind-hearted individual.