Enrollments of international students are at very high levels in the U.S., a development that has altered the demographics of first-year composition classes in recent years. Nonetheless, writing instructors and administrators often know little about these students' backgrounds, which can make it difficult to design pedagogies that are responsive to their specific needs. Drawing on data from a qualitative, longitudinal study with a cohort of undergraduate international students, this article addresses three interrelated issues: 1) precollege writing experiences of international students in both their first languages and English; 2) key points of challenge and discovery for international students as they enter the culture of U.S. academic writing; and 3) possible pedagogic interventions designed to better support international students. Situating findings in relation to recent scholarship on students' transitions from high school to college, the article explores ways in which the experiences of international students are both similar to and different than those of their U.S.-educated peers.