Kindergarten teachers expect that children come in not being able to sit still. Your child may be on the extreme end of the spectrum regarding movement, but as a former teacher and having a lot of K teachers as friends (My DS is 4.5 and I'm always hammering these friends with the same questions), you may be worrying about something that will turn out to be not such a big deal. Some teachers totally get that 5 year olds need to move all day and learn in that way. Some don't. Perhaps talk to the principal about your concerns so that they will assign a teacher is gets this.
I have one child who sits for hours focusing on the something and one that can't stop moving! I fret about their school experience all the time.
