This study examined Principals’ Leadership Effectiveness and Management of Public
Secondary Schools in Cross River State, Nigeria. The purpose of the study was to investigate
influence of principals’ leadership effectiveness in the areas of instructional supervision,
communication, and provision of instructional materials on the management of public
secondary schools. Three research questions guided the study and three null hypotheses were
formulated and tested. The review of literature was done under theoretical framework,
conceptual framework and empirical studies. The study adopted survey research design. The
population of the study comprised 12,930 principals and teachers from the 293 public
secondary schools in the state. A sample of 1737 principals and teachers were taken for the
questionnaire using multi-stage sampling technique of Principals’ Leadership Questionnaire
(PLEQ) with reliability coefficient of 0.97. Mean and standard deviation were used to answer
the research questions. Chi-Square test was used to test the hypotheses at 0.05 level of
significance. The result showed that principals’ leadership effectiveness do significantly impact
on management of secondary schools in the areas of instructional supervision, communication,
and provision of instructional materials in the management. Based on the findings of the study,
it was recommended among others that principals should be adequately enlightened with more
robust supervision strategies through seminars and conferences which may include classroom
observation, analysis/strategy, post observation conferences and post conferences analysis and
that Ministries of Education should make it mandatory for all school heads to be involved in
students’ evaluation in order to assess teachers’ job outputs as well as students’ academic
performance