Pilot test, observational study.To evaluate objectively the knowledge transfer provided by theoretical and practical activities during AOSpine courses for spine surgeons.During two AOSpine principles courses, 62 participants underwent precourse assessment, which consisted of questions about their professional experience, preferences regarding adolescent idiopathic scoliosis (AIS) classification, and classifying the curves by means of the Lenke classification of two AIS clinical cases. Two learning strategies were used during the course. A postcourse questionnaire was applied to reclassify the same deformity cases. Differences in the correct answers of clinical cases between pre- and postcourse were analyzed, revealing the number of participants whose accuracy in classification improved after the course.Analysis showed a decrease in the number of participants with wrong answers in both cases after the course. In the first case, statistically significant differences were observed in both curve pattern (83.3%, p = 0.005) and lumbar spine modifier (46.6%, p = 0.049). No statistically significant improvement was seen in the sagittal thoracic modifier (33.3%, p = 0.309). In the second case, statistical improvement was obtained in curve pattern (27.4%, p = 0.018). No statistically significant improvement was seen regarding lumbar spine modifier (9.8%, p = 0.121) and sagittal thoracic modifier (12.9%, p = 0.081).This pilot test showed objectively that learning strategies used during AOSpine courses improved the participants' knowledge. Teaching strategies must be continually improved to ensure an optimal level of knowledge transfer.