This study evaluates the effects of a physiotherapist-led, school-based back-health education program delivered in primary school classrooms. The intervention consists of a theoretical-practical workshop focused on postural habits, physical activity, electronic device use, and backpack handling. The study includes schoolchildren with and without spinal pain and assesses changes in spinal pain characteristics, postural behaviors, physical activity patterns, and electronic device use over a three-month period. The main objective is to determine whether this educational program improves back-health behaviors and related outcomes in the school setting.