Classroom Management

How much does a teacher ignore small disruptions in a classroom?  How much time do you take managing the class?  Does everything need to be a lesson in behavior?  Can external movements and noises be ignored and still effectively teach a lesson?  I think there needs to be a mutual acceptance on where everyone is emotionally and physically as participants in the classroom.  What I mean by that is, as a teacher, I want to be able to fully embrace the middle schooler and how they operate in the world.  I don't mean to say that my classroom is going to be utter chaos.  If I want my students to meet me where I am at as far as helping them learn to love social studies, then I need to meet them where they are in their maturity level and skill base.  I think I need to embrace the middle school craziness and goofiness in order to be able to run my classroom effectively.  Fighting against it is fruitless.  They are middle schoolers.  Am I there to some capacity to teach them how to behave appropriately in school?  Yes, of course, but to earn trust means that I need to accept them for where they are in their life which is young adolescence.  I feel that will work in my favor when I really do need to demand their utmost attention.  I hope to respect my students and hope they will respect me.