ABSTRACT
The purpose of this study was to examine the factors affecting the performance in physics in Kenya Certificate of Secondary Education in Kisii South district. The specific objectives were to examine the endogenous and exogenous factors affecting the performance in physics in Kisii south District. Questionnaires were the main method used for data collection .They was of two types, the students' questionnaires and the teachers' questionnaires. The findings were presented in tabular fmm and interpreted in line with specific objectives and the research questions. The findings were linked to the literature review of chapter two. From the findings ofthe research work, recommendations were made so as to boost the students' performance in physics.
