This report provides information about the sample, survey instrument, and resultant data for the 2021 Learn Together Surveys (LTS) that were administered to secondary principals and teachers in March 2021 via the RAND Corporation's American Educator Panels. It includes a full set of basic frequency tables for each survey. The LTS focus on several topics, including serving students with disabilities, supporting students' transitions to postsecondary pathways, data use, student voice, and social and emotional learning, and the survey results are intended to inform policy and practice related to these and other topics. This report serves as technical documentation for reports and data notes that draw on 2021 LTS data. The 2021 LTS yielded 3,605 complete responses for teachers and 1,686 complete responses for principals, and the responses are weighted to ensure that they are nationally representative. [For the 2020 report, see ED615566.]