The Texas Education Agency offers grants for districts to implement school turnaround strategies at low-performing schools. Districts that receive these grants can implement a school turnaround strategy (referred to as a district-managed restart strategy) that includes replacing principals and teachers at schools that the district identifies as struggling and needing additional support. The "Effects of a District-Managed Restart Strategy for Low-Performing Schools in Texas" study examined implementation of the restart strategy and its effects on teacher and principal mobility, student achievement, and student attendance. This document presents the following four appendixes that accompany the study: (1) Data and methods; (2) Supporting analyses; (3) Supplemental analyses; and (4) Interview sample and protocol. [For the full report, see ED621559. For the Study Snapshot, see ED621561.]