This study examined the effects of supervisory practices of school inspectors on classroom teaching in Lagos State Education District V of Lagos State Public Secondary School. The study adopted descriptive research design. The population consisted of all public secondary schools in Lagos State Education District V. The sample comprised 200 respondents from public secondary schools. The simple random sampling technique was used in selecting the sample. This gives equal opportunity for all respondents to be part of the sample. Data was collected with self-developed supervisory roles of School Inspectors on Classroom Teaching (ARSICTQ). Data collected were analysed using frequency count, simple percentages for the demographic data while the inferential statistics of Pearson Product Moment Correlation Coefficient (PPMCC) and Chi-square were used to test all the four hypotheses at 0.05 level of significance. The results showed that school supervisory roles and teacher’s performance have a statistically significant linear relationship. The direction of the relationship is positive i.e., greater school supervisory roles are associated with greater teachers’ performance. The findings also revealed that school supervisory roles and educational outcome have a statistically significant linear relationship. The direction of the relationship is positive i.e., greater school supervisory roles is associated with greater educational outcome. The results further revealed that there was a significant difference between teacher’s performance before and after inspector’s supervisory activities in Lagos State Education District V. The result also indicated that there was a difference in school inspector’s supervisory roles and supervisory roles of the school principal in Lagos State Education District V. It can be concluded that supervisory roles of school inspectors play significant roles in the determination of classroom teaching outcome in public secondary school. It was therefore recommended that parents should be ready to give quality attention to the needs of children in order to support their learning.

Keywords: Supervisory Roles, School Inspectors, Classroom Teaching, Educational District, Public Secondary,

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