@Mwfan1921: check out the book by Rachel Toor. She used to be an adcom member at Duke. High Schools are read in order by state/region. The docket is listed in descending order by high school rank/GPA and test scores. In cases where high schools don’t rank, they can estimate based on previous applications, and GPAs from current students who apply. The recent harvard litigation also seems to suggest that they impute rank whenever they can.