Resumen: International higher education policies and literature have called for students and faculty to collaborate effectively in the co-designing and co-teaching of curricula. In the fall of 2017, the Department of Electrical Engineering of National Taiwan University launched the “Creative Cornerstone Course Design for ICT+ and Engineering Education” course, which is a co-design course, to engage higher division and graduate students in co-creating and co-teaching the curriculum of a “Cornerstone EECS Design and Implementation” freshman course, which was a cornerstone course to be conducted in the spring of 2018. This paper presents the educational practice and learning outcomes of the co-design course. The implementation of the co-design course involved the following activities: (a) project- and team-based learning approaches, (b) active student partnership with teachers for designing the cornerstone course curriculum, and (c) preparatory cultivation of the students as teaching assistants for co-teaching. Learning outcome analysis indicated that freshman students significantly benefited in terms of their self-exploration of ICT-related subjects, basic professional knowledge, operational techniques, and confidence in self-learning when the cornerstone course was developed through co-designing.+ICT: Information and Communication Technology