The development of clinical reasoning skills is a high priority during clinical service, but an unpredictable case load and limited time for formal instruction makes it challenging for faculty to foster and assess students individual clinical reasoning skills. We developed an assessment for learning activity that helps students build their clinical reasoning skills based on a modified version of the script concordance test (SCT). To modify the standard SCT, we simplified it by limiting students to a 3-point Likert scale instead of a 5-point scale and added a free-text box for students to provide justification for their answer. Students completed the modified SCT during clinical rounds to prompt a group discussion with the instructor. Student feedback was positive, and the instructor gained valuable insight into the students thought process. A modified SCT can be adopted as part of a multimodal approach to teaching on the clinic floor. The purpose of this article is to describe our modifications to the standard SCT and findings from implementation in a clinical rounds setting as a method of formative assessment for learning and developing clinical reasoning skills.