A continued lackluster academic achievement in secondary schools in Teso South Sub-County, Busia County, Kenya was the heart of this study. The study was to investigate the implication of parental and teachers' involvement on students academic achievement in public secondary schools in this region. The specific objectives zeroed on communication, consultation, support and supervision and their influence on students academic achievement. This study was guided by Ecological Systems Theory advanced by Bronfenbrenner. The study used a survey design strategy with target population comprising of...