This study was carried out to examine theDuties of Duties of Workers management and public secondary school effectiveness in Lagos State education district IV. Specifically, the study was aimed at examining the Duties and roles of the school human resource management in public secondary schools, examine Workers management leadership styles and teachers' productivity in secondary schools, and assess ways through which Workers managers in schools can motivate teachers and the impact to enhancing quality education effectiveness in secondary schools. The study employed the survey descriptive research design. A total of 230 responses were validated from the survey.From the responses obtained and analysed, the findings revealed that there is a positive significant relationship between human resource management Duties and secondary school effectiveness. Also, the findings revealed that there is a significant positive influence of management styles on teachers’ productivity and job satisfaction in public secondary schools. Furthermore, the findings revealed that there is a positive significant relationship between motivation and teacher’s productivity in public secondary schools effectiveness. The study therefore recommend that training and development programmes/policy should be introduce and monitor to ensure the implementation like in-service course for teachers, staff seminar like induction courses, on-the-job-training, off-the-job-training. Refreshers courses etc. Also, human resource management should have sound policies in respect of staff transfer and promotion to ensure that justices and fairness prevail in dealing with the staff. More so, teachers who are the bedrock of any education system need to be treated fairly well in terms of prompt settlements of their entitlements and enjoyment of other benefits enjoyed by other public servants. So that the desire of the government, parents and solicit for an improved educational system will be a hopeful dream and not a night mare; and investment in education will be very beneficial to society in the final analysis.