At the core of school improvement and education reform is an assumption so widely understood that it is rarely invoked: students have to be present and engaged in order to learn. That is why the discovery that thousands of our youngest students are academically at-risk--because of extended absences when they first embark upon their school…

This study looks at attendance in the early grades of elementary school. In particular, the authors focus on students enrolled in Pre-Kindergarten (PreK) and Kindergarten (K). They follow these young students over several years to determine their pattern of chronic absence (CA), defined as missing more than one-ninth of days enrolled, and their…