We present our case study of an interdisciplinary team project for students taking either a psychology or computer science (CS) course. The project required psychology and CS students to combine their knowledge and skills to create an online cognitive task. Each interdisciplinary project team included two psychology students who conducted library research and drafted a design protocol for the cognitive task and a CS student who created the online version. The teams produced nine applets to test cognitive abilities such as memory and imagery. Our pre-post Interdisciplinary Team Project Survey indicated students gained significant experience working with each other by the end of the semester. Psychology students reported increases in areas such as summarizing data and delivering an oral presentation. CS students reported gains in computer programming. Leadership ratings moved upward for CS students, and psychology students reported greater experience conducting team projects by the end of the semester. CS students experienced some challenges with the interdisciplinary project regarding time management. We offer lessons learned and identify strategies for improving interdisciplinary team projects. An interdisciplinary team project prepares students for the type of work they will find in graduate school or workplace.