Do you want to learn how to measure students’ disposition toward library research? The retrospective pre/then/post test design is an efficient and reliable method to document learners’ attitudes, values, and emotion. This session will be relevant to librarians who are just getting started with assessment and those who would like to advance their practice. Gain assessment techniques to improve student learning and document evidence of information literacy impact. Objectives: Describe the Understanding by Design approach to lesson planning Recognize the application of the retrospective pre/then/post design methodology to information literacy instruction Reflect on opportunities to incorporate assessment measures in instruction