Make a few visits to the preschool in the weeks leading up to the first day. If there is an orientation, make sure to attend it with your child so he can meet the teacher, or arrange another time for him to do so. If possible, spend time in the classroom and in the play areas, or simply walk around outside the building on a few different occasions. Make sure your child knows where the bathroom is located and any other orienting details that he needs. The more time you can spend at the school before school actually starts, the easier the transition will be.