This document provides strategies for communities to address summer learning loss through better collection and use of data. It recommends that communities: 1) Talk to local funders to understand their data needs and priorities around literacy goals, and research how local school districts currently assess and track summer learning loss. 2) Work with community partners to define a shared approach to measuring summer learning loss in order to establish a baseline and track progress toward reducing it by 20%. 3) Use school data to identify students who would benefit from summer learning support and prioritize them for summer program opportunities.