dc.description.abstract | This study was conceived on realization that despite previous efforts, performance in science subjects is still poor among secondary school students in Busia County. It set to investigate factors that contribute to poor performance in science subjects among students in secondary schools in Busia County, Kenya. The input – output relationship or education production function was used. The study employed a cross – section research design whereby a total number of 110 students from six schools in the county, 15 students from three schools outside the county and 45 teachers were involved. Data collection was achieved through use of questionnaires and structured interviews. Microsoft Excel and SPSS were tools used to analyze the data collected. Key words: Factors, Subject, Science Learning Environment, Teaching Materials, Performance and Poor Performance. Main findings of this study showed that factors which affect science subjects’ performance are; poor methodology in science education, negative attitude toward science subjects among student, unfavorable home environment and family background, chronic absenteeism emanating from lacks of school fees, admission of weak students at form one entry, inadequate instructional material and physical facilities. It is recommended that the government and private school owners must ensure that the government and private schools are well equipped with necessary materials. Government should reduce parental burden in the provision of curriculum materials and teachers should use modern methods of teaching science subjects in order to motivate and sustain student’s interest in science subjects | en_US |