This study focuses on a Shenzhen-based teacher training institution, employing a mixed-methods research design that integrates questionnaire surveys, in-depth interviews, and case analyses to explore the application and effectiveness of flexible learning and instruction delivery models in the continuing education of primary and secondary school teachers. The findings reveal that this model significantly enhances teachers’ course selection volume, attendance rates, and satisfaction, and bolsters the learning outcomes of the participants as well as the enthusiasm of the instructors. However, there is a need to further strengthen the translation of learning outcomes into practical teaching capabilities. This research provides empirical evidence for the reform and development of continuing education for primary and secondary school teachers and proposes a dual-wheel strategy to improve the effectiveness of teacher training and the efficiency of educational resource utilization, which holds significant practical implications and innovative value.