As a classroom teacher/educator, do you believe there are instances or behaviors

As a classroom teacher/educator, do you believe there are instances or behaviors that make it necessary to remove a student from class? List some of these behaviors and why it is necessary for removal. 
How often would you say you have a student removed from class? Are these behaviors the same as the ones you listed above?
As a classroom teacher/educator do you believe there are instances or behaviors that make it necessary to remove a student from school? List some of these behaviors and why it is necessary for removal.
When students are removed from your class, how are they reintegrated, or welcomed back, in? 
When students are removed from the school through suspension or expulsion, how are they reintegrated, or welcomed back, in?
What impacts do the practices or removing students from class or school have on you, your students, and the full school community? Do you believe there needs to be any changes to these practices? Why or why not?
PLEASE USE THE TWO ATTACHED ARTICLES AS A RESOURCE TO HELP ANSWER ANY OF THE QUESTIONS. I HAVE TO INCLUDE COURSE MATERIAL IN MY RESPONSES.