From the report: "We find that, overall, students earned about two additional weeks of instructional gains in math and nearly three weeks in reading on standardized assessments when using the i-Ready platform, and this is especially true for students who receive free or reduced-price meals, who identify as Black, and who identify as male. Additionally, students who complete roughly 70 lessons in reading and 50 lessons in math earned roughly two months of instructional gains. Our findings suggest that online platforms such as i-Ready are useful recovery tools that can help school districts enhance student learning and mitigate both the effects of COVID-19 and longstanding demographic-related achievement gaps."