This appendix accompanies the report, "Are Neighborhood Factors Associated with the Quality of Early Childhood Education in North Carolina? REL 2021-034." It describes the study's primary and supplemental sample selection procedures, how eligible postsecondary institutions for the study were identified, geocoding procedures, how counts and distance were calculated, and additional details on the analyses. [For the full report, see ED608341. For the study snapshot, see ED608342.]