These are the appendixes for the report, "Do College and Career Readiness and Early College Success in Indiana Vary Depending on Whether Students Attend Public, Charter, or Private Voucher High Schools? REL 2021-071." This study examined how Indiana grade 9 students with different types of high school enrollment performed on indicators of college and career readiness and early college success during and after high school. Additional information about these types of high school enrollment is in this appendix. Appendixes in this document include: (1) Background on school choice in Indiana; (2) Methods; and (3) Supporting analysis. [For the full report, see ED611171; for the study brief, see ED611173; and for the study snapshot, see ED611172.]