Corruption is a concept associated with most third world countries, especially those in Africa. Corruption, defined in its most basic form as fraud and abuse of power, is a worldwide problem. It shows that Sierra Leone's secondary education curriculum still has a long way to go in the fight against corruption. There is also evidence that some middle school administrators tasked with preventing corruption are part of the brains behind middle school corruption. This study aims to evaluate the role of school administrators in preventing corruption in their own institutions. The study focused on the effects of corruption, different types of corruption and some of the administrative tactics used by managers to fight corruption, with Sierra-Leone as a case study. As a result of the late payment of the salary, the study also uses an ex-post facto research design and a quantitative research approach. The candidate participants of the study were lecturers/teachers and other administrative officials selected using this sampling technique, and their perspectives were examined using a questionnaire to get their views. 200 questionnaires were applied to the participants from 5 secondary school sample groups. Descriptive and inferential statistics were used to analyze the data. The study aims to contribute knowledge and assist school administrators in their efforts to regulate and curb the rapid rise of corruption. As a result of the research, it is recommended that secondary school principals be given the necessary skills and abilities to fight corruption.