Make sure you provide good clear written instructions, that the students can use, over and over again, when you are long past the rear view mirror.....
Don't play favorites in the class, everyone else will feel slighted.
Don't allow click (small social group) conversations, that is so distracting from everyone else....
Speak clear and carefully so everyone in the room (front row to back row) can hear you....
Have examples to show ....what to do and WHY....what not to do and WHY....a lot of people are visual learners.
IF you are comfortable give out your phone number or perhaps your email address for followup questions....
Stay after class for questions.....
Make sure you enforce the concept of enjoying what you are doing and to have fun with quilting....
It is not a science...but a craft, that will be learned over a period of time...
Enforce there is a learning curve, students will make mistakes, expect it , embrace it and move on......