The Reimagining College Access (RCA) initiative is a national effort to advance the use of student performance assessments to inform higher education admissions, placement, and advising decisions. RCA brings together a diverse group of K–12 and higher education leaders engaged in using authentic assessments of students’ competencies and mastery of the skills needed for college, work, and life in the 21st century. As K–12 schools expand instruction to include 21st century competencies, education systems are also developing ways to measure mastery of these skills through performance-based assessments, which can better gauge students’ critical thinking skills and college readiness. Simultaneously, a growing number of higher education institutions are exploring how to incorporate broader portfolios of student work in a more holistic admissions process that factors in academic, nonacademic, and contextual information about applicants, as well as in placement and advising decisions.