The current study investigated perceived development of pre-service teachers in their Instructional Material Design (IMD) competencies through the course "Instructional Technology and Material Design," which is based on a technological, pedagogical, and content knowledge (TPACK) framework. A total of 22 Elementary Education pre-service teachers participated in the study. Five activities based on TPACK were designed by the instructors to provide students with specific teaching experience. Action research methodology was followed during the study, and each activity was part of the cycle of design. Data were collected through a questionnaire on pre-service teachers' IMD competencies, their journals, assignments, open-ended questionnaires, teaching practice forms, observations, and software evaluation forms. The study revealed that pre-service teachers gained essential competencies in instructional material design. Moreover, the results showed that they experienced incorporating TPACK into their future teaching practices.