If you dream of the school, it could be interpreted as the past and the future. If you are still going to school it is obviously the place where you spend most of your time and experiencing many different emotions, therefore it reflects in the dreams. If you are not going to school for a long time, then the dream could indicate the lessons you learn at your waking life. The new experiences associates with the school, because it is the place where children learns something new every day.
Read more about dreaming of School in other dream meanings interpretations.