You In a Sentence
Sometimes Scripture gives us an entire life in a sentence. A person appears briefly in the biblical story, and the few words used to describe them become the way they are remembered.
So you are the leader of the school. What is your job? The simple answer is that you should spend the majority of your time on that activity that only you can do. Everything else is delegated and should be whenever that is possible. There are some duties however, that no matter where you are as a leader you cannot delegate and those are your duties/activities and they involve the organization's health and building the future of your school. They are as follows:
Unfortunately, many leaders fill their schedules with appointments and meetings, based on requests from endless number of people who want their attention. That is a problem. Leaders have to be about the above activities. For example, often teachers have a favourite activity in which they developed competence, i.e. coaching basketball, the teacher is then promoted to a leadership role and they hang on to the coaching. That is a problem.
Your job is spending most of your time doing activities that will impact the above four areas either directly or indirectly.