In this article, the authors contribute to the conversation on High Impact Practice (HIPs) focusing on the connection between sense of accomplishment and what is high impact by discussing data from their study of signature assignments. Signature assignments are assignments within a single course or unit that give students choice, require synthesis and application, and include significant reflection. While not themselves, one of the ten key educational practices of HIP, they are inspired by the official HIP, Capstone Courses and Projects. In this study of signature assignments, college student participants describe impact in terms of sense of accomplishment. They describe powerful moments of finding joy in their learning, feeling a growing sense of belonging within their learning, and seeking relationship-rich connections through their learning. The authors see the students' comments as evidence supporting sense of accomplishment as a critical component of HIPs and other high-impact experiences.