Reframing History is the result of a two-year, deep-dive research effort to understand how Americans think about history and how communicators can more effectively explain why history matters to society. In this appendix, we describe the research conducted as part of this project, in which we designed and tested different ways of framing history and its value in society to address public thinking about this issue, including overcoming the challenges and leveraging the opportunities presented by this thinking. These frames were tested in 2020–2021 using three methods: on-the-screen (OTS) interviews, a survey experiment, and peer-discourse sessions (PDS). In total, 5,062 people were included in this research.