Assessing new strategies such as monitoring and supervision strategies, motivation strategies, role model strategies and social media strategies among others in principals management capacity in planning, organizing, directing, coordinating and controlling is paramount for teachers job performance in lesson plan, lesson delivery, teaching strategies, lesson notes and classroom management. This study was carried out using correlational research design. The population of the study is 309 principals and 4,388 teachers in Senior Secondary Schools (SSS) in Adamawa State. A sample of 46 principals and 439 teachers was used for the study. Two questionnaires were used for the study. Results obtained shows that there is a significant relationships between principals management capacity in planning, organizing, directing, coordinating and controlling as it predicts teachers job performance in lesson plan, lesson delivery, teaching strategies, lesson notes and classroom management. Based on this it is recommended that; Principals should emphasize on their planning capacity for proper guidance on what teachers need to do for effective teaching/learning in SSS in Adamawa State, Principal should assign duties and responsibilities to teachers for effective teaching/learning in SSS in Adamawa State, Principals should use effective monitoring and supervision strategies in working with teachers for effective teaching/learning in SSS in Adamawa State.