This technical appendix provides additional information about the sample, data, and estimation strategy that were used for a series of AEP Data Notes published by the RAND Corporation in 2018 and 2019. The Data Note series is intended to provide brief, incisive analyses of teacher and school leader survey results which may be of immediate interest to policymakers, practitioners, and researchers. The information pertains to the first set of Data Notes, which will be released starting in 2018.