This document discusses a study examining factors that influence teacher job satisfaction and secondary school effectiveness in Nigeria. The study aimed to determine what factors of school facilities, teacher characteristics, and human relations influence teacher job satisfaction. A sample of 512 teachers was surveyed using a 15-item questionnaire to answer 3 research questions on factors of school facilities, teacher characteristics, and human relations that determine teacher job satisfaction. The findings indicated that inadequate classroom environment and school facilities produced negative teacher job satisfaction. It was recommended that school laboratories be better equipped to promote effective teaching.