This study addresses the need for reliable and valid information about how the innovative classrooms that are becoming more common on college and university campuses affect teaching and learning. The Social Context and Learning Environments (SCALE) survey was developed though a three-stage process involving almost 1300 college students. Exploratory and confirmatory factor analyses supported a four-factor solution that measures formal and informal aspects of student-student and student-instructor classroom relations. The resulting 26-item instrument can be used by instructors and researchers to measure classroom social context in different types of learning spaces and to guide efforts to improve student outcomes