This 1978 report, prepared from data supplied by Educational Research Service, Inc., deals specifically with 1977-78 comparative data about salaries paid to principals and assistant principals in approximately 1,146 public school districts. Section 1 compares the lowest and highest 1977-78 salaries paid to principals and assistant principals, using school district enrollment stratum as a comparative factor. Section 2 discloses a similar comparison of salaries paid, using per pupil expenditure in the school system as a factor for comparison. Section 3 contains a trend analysis of salaries paid to a selected group of administrators using data from 1976-77 and 1977-78. Section 4 discloses the mean of average daily rates paid principals and assistant principals during 1977-78 in reporting school districts, by geographic region. (Author/MLF)