The instructors will review the principles of public health to provide students with sound scientific basis of understanding current public health issues. The class will use an interactive instruction method to enhance student’s overall learning quality. The instructors will use case studies, field trips or guest lectures to enrich student’s appreciation of real-world situations of public health practice. The class promote student’s active participation in the teaching by requiring them to present their individual reports of three field trips and one group proposal for improving a specific public health problem.