A form of group learning, cohorts, has become increasingly attractive to administrators, instructors, and participants in adult education. Basic academic skills cohort learning supports three types of knowing: instrumental, socializing, and self-authoring; whereas, in higher and adult education cohort learning, the development of critical reflection and knowledge construction is the focus. Cohort learners report such positive effects as increased critical thinking skills, greater individual development, enhanced knowledge base, and learning motivation. Some research has revealed that not all cohorts work well, due to characteristics and behaviors of group members. Actual measurement of cohort learning outcomes has been inadequately studied. Educators can enhance the cohort experience by doing the following: (1) developing group relationships at the beginning; (2) balancing group and individual development; (3) providing an environment that both supports and challenges; and 4) acknowledging and addressing group and individual tensions. (Contains 12 references.) (AJ)