This research uses collaborative action research to explore how Case Method Instruction (CMI) can be adopted to introduce a creative drama course in the pre-service preschool teacher-training program. The findings suggest 7 steps of CMI: "case selection and analysis' "theory instruction", "case paper reading' "case report writing", "teacher-guided activities", "case discussion”, and "extension activities". Based upon the teacher’s reflection and student’s responses, it appears that for a better quality of student reports, in terms of their width and depth, Step 4 should proceed after Step 6. Moreover, it is also found that teachers need to select those cases that suit the teaching objectives of the class in Step 1. It would be more coherent and meaningful to the students if the lessons for teacher-guided activities in Step 5 and those for case discussion in Step 6 could be combined and unified. For the students, CMI not only increases their understanding of the theories and pedagogy related to Creative Drama but also strengthens the teacher’s ability in designing drama lessons for young children. In future studies, it is suggested that more cases could be developed particularly for the novice teacher to get closer to their own teaching experiences.