Integrating concept based instruction and self directed learning develops the four Cs in Cambodian teacher education

The present study aimed to fill the gap in the limited evidence concerning the integration of concept-based instruction, self-directed learning, and project-based learning in a holistic framework to develop 4Cs among Cambodian student teachers. This paper employs an integrative, multiobjective approach to synthesize data from five empirical studies on 300 student teachers at Battambang Teacher Education College. The study adopts a mixed-methods approach to triangulate data using validated 4Cs rubrics, self-directed learning, questionnaires (α = 0.94), and thematic analysis of reflection journals. The results show that compared with separate teaching methods, the integrated framework yields better synergistic effects. Pilot implementation revealed that critical thinking improved by 20%, teamwork by 18%, and self-directed learning by 22%. The data support a four-step, scalable model that includes identifying the concept, planning the SDL, developing the project, and conducting structured reflection. Policy implications include ensuring that national standards for teacher education specify consistent teaching methods and promote 21st-century skills. This study offers practical guidance for ensuring that teacher training meets both global educational standards and the needs of the local community. A variety of mixed methods should be employed rather than the sole use of a method.