ABSTRACT
The study is on the assessment of supervisory role performance of principals on teachers' duties in secondary school in Kogi State. It identified the perceived effectiveness of principals in the supervision of teachers' duties some of the objectives of the study were to examine the supervisory role performance of principals on punctuality of teachers, to determine the supervisory role performance of principals on teachers design of lesson plan/note, to examine the supervisory role of principals on teacher's evaluation of students and to findout the supervisory role performance of principals on conduct of extra curricula activities in secondary schools in Kogi State. The related literature review was based on the variables in the objectives of the study. Also concept of duty and meaning of supervisory role was reviewed. Five research questions, five null hypotheses were formulated based on the objectives. Survey research design was used andthe population of the study includes 244 principals, 2,280 teachers and 6,800 SS 1 and SS 2 students. The sample size was determined usingNwana technique ofpercentage and stratified random method. The sample size is 548Structured questionnaire was used using Likert rating scaleand content validity was used. The pilot study was carried out using five schools outside the sampled schools 5 principals, 25 teachers and seventy students. The reliability of the instrument was determined using Cronbach alpha and the reliability coefficient is .9310.analysis of variance (ANOVA) was used for testing the hypotheses at 0.05 significant level the findings revealed that principals used attendance register, they made sure that teachers prepared lesson plans/notes before going to the class to teach among other findings. Some of the recommendations of the study were that principal should intensify more efforts in supervision of teachers and students punctuality, that relevant textbooks should be provided to help teachers in preparation for their lesson and writing of lesson plan/note. Principals should always ensure that teachers break the content of each topic to be taught and enter into the diary and also that government and principals should ensure that the number of students in each class do not exceed 40-45 for effective evaluation and management of students. Also principals ensured that teachers evaluate students through continuous assessment, more sporting facilities should be provided for schools.