The 35th edition of the Annie E. Casey Foundation's "KIDS COUNT"® Data Book examines the unprecedented declines in student math and reading proficiency brought on by the COVID-19 pandemic's effect on education. The latest data from the National Assessment of Educational Progress reveals that between 2019 and 2022, fourth-grade reading and eighth-grade math scores plummeted, representing decades of lost progress. This alarming trend underscores the urgent need for action to address the growing academic disparities among U.S. students. Today's students, who will comprise America's future workforce, are ill-prepared for the high-level reading, math and problem-solving skills required in a competitive global economy. The failure to adequately prepare our children will have dire consequences for their futures and for the economic vitality of our nation. [For "KIDS COUNT Data Book, 2023: State Trends in Child Well-Being," see ED629264.]