The first is to describe schools are organized and interwoven in US system. Another important organizational concept to keep in mind is the difference between line and staff relationships. When one person has authority over another, there is a line relationship. When there is not formal supervisory authority of one person over the other, they have a staff relationship. The basic building block of the US ed.
Principal is in charge of the school.
In law the principal is the final authority at the school. Assistant principals help principals administer the school. See figure 6.1 on pg. The superintendent is expected to be visible in the community and to provide overall leadership for the district. See figure 6.2 on page 186 Organization of education at the State level See figure 6.4 on page 188.