Classroom questions

I love my school entirely.  I found that when you get to know students on a personal level they tend to listen and respect you more.  I think this is where my teacher falls a little short.  She does not take the time to ask them about their lives or comment on things that have passed and she has problems with classroom management.  I was so excited, the students were upset that next week will be my last three weeks because they were going to miss me (sad face)  The longer I am in the classroom, the more I step up, I help with classroom management, teaching her lessons, test, quizzes, I keep up on the stories and I absolutely love it.  I really admire how my teacher uses technology in the classroom in such an interactive way, I think that is one thing I will definitely take from her.  Also she is a big constructivist teacher and I also admire that, the students get really involved in the lessons.  Lastly, what I have been going back and forth about is whether to have differentiated teaching and lessons for a lower level class or if I should challenge them to rise to the same level as their peers?
Lastly, my teacher has told me to work with certain students because they listen to me over her, I feel that she should be able to maintain her class without me because I am a temporary person.  What are your feelings?