This edition of the Equity Dispatch explores the notion of summer learning loss – also called “summer slide” or “summer brain drain” – that has been part of educational discourse in the United States for several decades now. The supporting research typically uses spring and fall test score data to draw comparisons between students from different socioeconomic backgrounds, showing that students from low-income families perform at the same level or lower on their fall assessments than they did on their spring assessments, while middle and upper income students perform slightly better on reading and mathematics tests between spring and fall.