Thank you all for your replies and for sharing your Montessori experiences. Based on your replies, I think I have found the right forum to discuss my daughter's advanced skills. For that, I am thankful because I was starting to feel isolated on the parenting forum in which I usually participate. The preschool program we are looking at is a mixed-age (3-6yo) program, three mornings a week. You have definitely given me some ideas to focus on when we make our school visit. Thanks again!