It is very important that as the instructor you create an open and positive environment.  First of all, you need to allow the students to understand where you are coming from.  They should understand that respect to all is very important in creating an  open environment.  You want your students to feel comfortable with you and also with their classmates. If they are both of these things then they will come to you with their needs instead of feeling pressured.  This will also create an open door policy for all of the needs of your students.