To investigate if students were engaged in deep learning in a flipped classroom, a qualitative research method was used, with questionnaires, short interviews and observations. The first source of data - questionnaires focusing on the online lecture - were given to the students immediately after each flipped class. The second source of data - short interviews with a small sample of the two cohort groups of the program - were semi-structured, with key questions asked on their experience or behavior in the flipped class, their knowledge of the topic taught, and their learning in the flipped classrooms. The study sampling had 19 students (nine from the first year cohort and 10 from the second year cohort). The final source of data was from the researcher’s personal reflection, abstracted from observational logs written during the flipped classes and from reflection notes written soon after each class.