This resource will provide an overview of instruments and measures used in UDL educational environments. Based on a review of published UDL research, we will present a sample of existing instruments to measure UDL implementation. In addition, we will focus on approaches to measuring student outcomes in UDL settings that are related to being an “expert learner”: (a) purpose/motivation/work ethic; (b) resourcefulness; (c) executive functioning; (d) social skills; (e) basic academic skills; (f) content knowledge; and (g) engagement. Finally, challenges in UDL measurements will be discussed.