Agbajeola, Rachael Oluwakemi, et al. “INFLUENCE OF TEACHERS’ PROFESSIONAL DEVELOPMENT ON STUDENTS’ ACADEMIC ACHIEVEMENT IN PUBLIC SENIOR SECONDARY SCHOOL MATHEMATICS IN THE GAMBIA”. African Journal of Behavioural and Scale Development Research, vol. 7, no. 1, Dec. 2025, doi:10.58579/AJB-SDR/7.1.2025.10.