School management committees' (SMCs) roles are crucial in the smooth, unfettered administration, development and provision of quality basic education. However, the preponderance of research evidence available indicates that in sub-Saharan Africa SMCs are not adequately involved in preparing and implementing school performance improvement plans (SPIPs). This study surveyed 298 SMC chairpersons and members in the South Tongu District (STD) of Ghana to investigate their knowledge and participation in SPIPs. The results showed that SMC members' limited knowledge of and low involvement in SPIP preparation and implementation were lower than the Ghana Education Service required, which hindered success and contribution to high quality teaching and learning in the schools. These results have implications for improving the quality of education for all by increasing their access to data, technical assistance, and financial resources at the basic school level. We recommend against this backdrop that the STD Education Directorate, in collaboration with the STD Assembly, conduct periodic training workshops, reward success, and provide clear guidelines and expectations to increase SMC members' knowledge and participation in successful SPIP preparation and implementation. Further research needs to focus on SMC members' capacity for sustained school improvement through education policy initiatives at the district and school levels.