This technical appendix outlines EROâs approach to evaluating the implementation of the âPhones Away for the Dayâ policy. It explains the questions we asked, who we engaged with, how we gathered information, and the methods we used to analyse, synthesise, and validate our findings. The technical appendix is set out in three parts. Part one, the technical notes and part two, the data collection tools, are together in a PDF file. Part three, the survey data tables, are in Excel workbooks.