In 2010, California adopted the Common Core State Standards (CCSS) for math and English. The new standards are part of a state effort to prepare students for college and careers in the 21st-century global economy and narrow longstanding achievement gaps. The state's implementation is complete, but because districts decide whether and when they will adopt the standards, far less is known about local efforts. In the full report, the authors surveyed school districts to gauge their progress on Common Core implementation. They then used statewide data and examined the differences in local textbook adoption to understand the effects of CCSS implementation on student outcomes. These technical appendices to the full report present: (1) Data and sample; (2) Methodology: difference-in-difference estimation; and (3) the Public Policy Institute of California Common Core implementation survey. [This report was written with research support from Courtney Lee. For the full report, "Common Core State Standards in California: Evaluating Local Implementation and Student Outcomes," see ED603723.]