Organisational behaviour in Nigerian secondary school management is examined in this essay. Nigeria faces many obstacles that make it hard to provide empowering, sustainable secondary education to the young. Insufficient federal, state, and local financing is education's biggest issue. Between 1997 and 2000, federal education spending was below 10% of total spending. According to the paper, secondary school organisational conduct is a major issue that can be addressed by vivid organisational observation. Secondary school settings have numerous perspectives and backgrounds, making it difficult to modify rapidly. However, school management can employ organisational behavioural theories to minimise this. If school administration understands organisational behaviour, kids can succeed. Secondary school administrators should also know how to manage and build strong relationships with students and parents for a positive school climate and to fulfill educational goals. Organisational behaviour helps school administrators motivate staff and pupils to succeed. Keywords: Development, Educational goals, Organizational behaviour, School administrator, Secondary school managemen