Human-Computer Interaction (HCI) is an essential skill for the future. However, previous observations have revealed a discrepancy between the programming training provided to HCI students and the skillset required in the HCI field. This article describes the development and implementation of a course tailored for 3rd-semester bachelor students of HCI to provide them with practical skills in programming interactive systems. The course, named Interactive Systems, spans two semesters and includes a combination of lectures and programming exercises, designed to meet the specific needs of HCI students. This module aims to bridge the gap between general computer science programming courses and the specialized requirements of HCI students. We present the concept, realization, and evaluation of this module.