This document provides examples of different classroom assessment techniques (CATs) that can be used in a one-shot library instruction session to assess student learning. It describes several CATs, including the one sentence summary, defining features matrix, directed paraphrasing, pro/con grid, what's the principle/tool, 1-minute paper/muddiest point, and misconception/preconception check. For each CAT, it provides a brief explanation of how it can be used and examples of questions or prompts for that CAT. These CATs allow instructors to check student understanding and gather feedback during and after a one-shot session in a quick and low-stakes way.