This publication marks the fourth edition of the Context and Performance (CAP) Report Card for Michigan elementary and middle schools, published every two years since 2013. The goal is to compare Michigan schools' relative performance by factoring in the role student poverty plays in affecting academic achievement. The CAP Report Card uses multiple years of student achievement data so that a single year's results do not significantly influence a school's grade. The past two editions each relied on three years of academic performance data -- based exclusively on either the old Michigan Educational Assessment Program, or MEAP, or the current Michigan Student Test of Educational Progress, or M-STEP. The 2019 report card relies on four full years of data, making use of the fact that students consistently took the same M-STEP tests over the period covered for this analysis. [For the 2017 report card, see ED588533.]