Advice
Listen to the children: they are brutally honest about a lot of things and they will also tell you how they feel but you occasionally will have a child that you need to talk to a bit before they open up, take the time to build that connection.
Also, if you have a problem with a coworker, talk to them first before going to the supervisor. However, do not feel bad going to the supervisor if the co-worker isn't doing what they are supposed to be. This is a hard jo, you're outisde all day handling all kinds of problems and if they are not heling they are hindering you, then you need to say something.