People usually appreciate being able to see possible career paths they can follow. Progress may not be possible within a single school but more likely within a system of schools (e.g. government) or genre of schools (e.g. international).
A clear representation of the positions, team structures and hierarchy allows an understanding of what can be achieved and how to achieve it.
The following link leads to an example of a staffing profile for a large school.
Keep hierarchical levels within a three-tier structure for each employment category. For example, teachers, senior teachers and leading teachers. For every fifteen teachers, expect there to be three senior teachers and one leading teacher.
A senior teacher may be a Head of Department and the Curriculum Coordinator may be a leading teacher.
Senior positions need not be permanent. Short-term projects provide opportunities for greater responsibility with agreed allowances.