When your child is going to be starting school preschool/kindergarten or you are moving to a new place (city/town/state) you need to start the process of checking out schools before you move.
Start looking on the internet to the school districts website to see stats etc on everything regarding that school. This is a critical step since it will give you most of the information that you will need.
Contact people whom you know to see if they know anything about the school district where you plan to move to.
Call the school district where you have an interest in having your child in and ask any questions that you may have. Ask them the stating dates of school and when it gets out for the summer so that you can plan your move accordingly and ask them when is the best time to arrive so that you can check out the school.
Once you have moved to your new area you should go around and take a look at the area around the schools where you want your children to attend and once you feel you have found the school where your child will be attending they will show you around if school is in session.