A school district has a volunteer board and at least a state-paid Superintendent.  There is generally a separate building for the School District.  When I worked for the North Slope School District there were 1 Superintendent, 3 Assistant Superintendents, 4 Directors of Education, 1 Finance Director and then associated clerical support.  This does not include Principals and Vice Principals, Counselors, Librarians and teachers in the 18 schools in the school district.