This appendix augments a report that updates 2013 guidance to school district leaders and their partners across the country who are interested in launching summer learning programs or improving established ones. In that report, the authors present recommendations based on evaluations, conducted between 2011 and 2016, of summer programs in five urban school districts. The Wallace Foundation selected these districts--Boston; Dallas; Duval County, Florida; Pittsburgh; and Rochester, New York--for the National Summer Learning Project (NSLP), a multi-year assessment of the effectiveness of voluntary, district-led summer learning programs offered at no cost to low-income, urban, elementary students. The five districts are among the nation's most advanced in their experience with comprehensive, voluntary summer learning programs. This appendix presents: (1) Preface; (2) Tables; (3) Collection of Primary Data: (a) Summer Site Observations; and (b) Daily Site Climate Surveys; and (2) Documentation Used in Classroom Observations: (a) 2014 Classroom Observation Protocol; and (b) End-of-Day Site Survey. [For the full report "Getting to Work on Summer Learning: Recommended Practices for Success, 2nd Ed. RAND Summer Learning Series," see ED591732.]