This study aims to design and validate an electronic performance support system that enables educators to use instructional technologies effectively and efficiently. The study was designed and conducted using developmental research methods and with the participation, at different stages, of educators and educational technology and software experts. The tangible product of the designed system is a session plan independent of the content. The system's activity database contains 44 activities. The system works as follows. Based on the learning outcome, student, educator, and environment characteristics, activities not deemed suitable are eliminated, the most suitable activities are presented for the educator to select, and the educator makes a selection. The educator then accesses a session plan produced by the system and can edit this plan as desired. The system has additional features that were created based on the opinions of educators and educational technology experts. These features are tools for supporting academic, technical, administrative, and professional cooperation. To validate the designed system, the views and recommendations of educators and software and educational technology experts were collected. All three groups confirmed the validity of the design. Nevertheless, based on the feedback received, improvements were made before giving the design its final shape.