Investigations pertaining directly and sometimes indirectly to the school administrator (viewed here as the formally designated leader) are discussed in this chapter in terms of research issues which, in the reviewer's judgment, are particularly significant at the present time. Such a selective approach is perhaps preferable to a more exhaustive but less analytic recital of studies, even if some worthwhile work must be omitted in the process. The following passages refer, with a few exceptions, to studies reported between January 1, 1964, and December 31, 1966.