The main objective of this study is to assess the role performance ot principals on the teacher’s adherence to the curriculum content in public secondary schools in Kogi State. Descriptive survey design was used and according to Adetoro (1986) and Nwana (2004) the following were the samples. Eight Local Government Areas. 21 principals, 190 teachers and 337 students were involved this research in Kogi State Nigeria. The instrument used was a structured questionnaire which reliability was found to be 0.9310 using Cronbach alpha. The hypothesis was tested using Anaiysis of Variance (A NOVA) at 0.05 significant level. The hypothesis which stated that there is significant difference in the opinions of principals, teachers ac Students (respondents) on teachers adherence to the curriculum was rejected as there were significant differences in the 3 categories of respondents. The finding showed that in the opinion of respondents the Principals did not closely supervised the teachers on the adherence to the curriculum. The recommendation is that the principals should monitor and supervise the breaking of curriculum into, lesson plan and the actual lesson delivery.