This article presents action research conducted on a newly proposed method for school counseling supervision, the 360° Case Conceptualization Process. Grounded in the Integrated Developmental Model for Supervision, we examine the use of this visual tool with school counselors-in-training during practicum and internship group supervision. Results from the initial round of research were positive, with discussions regarding student strengths demonstrating the most growth between group conceptualizations (83%), followed by counselor areas for improvement (80%). Student counselors-in-training reported higher levels of confidence in the supervision process. Results showed a need to increase discussions of diversity and the core conditions of counseling. We include pedagogical suggestions, student and professor feedback, and implications for future research.