This technical appendix supports the "New Mexico Charter School Study: Findings Report," providing detailed information on statistical methods and results. The document includes: (1) Overview of Study Design; (2) Charter School Lottery Study; and (3) Dual Language and Charter School Matching Study. The Charter School Lottery Study section describes the experimental methods and detailed findings. The Dual Language and Charter School Matching Study section describes the quasi-experimental methods and findings. [This report was written with Matthew Pahl, Michael Rodríguez, David Rogers, and Elizabeth Howard and produced in partnership with Public Charter Schools of New Mexico, and Dual Language Education of New Mexico. For the full report, see ED613420.]