It sounds like youre off to a pretty good start.As a former preschool teacher & now a mother myself, understanding your feelings( they are normal!) I have a few suggestions that may help.
Visiting the school before he starts once or a couple of times with your child can be a big help. that way he has already met his teacher and some of the other kids as well as have a look around. Doing this also allows you to observe the routine and allows for questions you may have.
When your drop off your son always remember to "say goodbye" and that you will return (after lunch, after nap etc.) Sneeking out does not help children feel secure
Remember it's always ok to call and ask how the day is going. We usually called new parents during nap to let them know about the day so far. Most teachers have notices "what we did today" or personal notes about each child's day & activities.
Be involved! Most classrooms welcome parent participation. I was always glad when parents expressed interest in or became involved in our activities.
If there's any way I can help please let me know
