The objective of this exploratory study of teacher beliefs was twofold: first, to determine whether the construct of academic optimism could be defined and measured as an individual teacher characteristic as it has been at the collective school level, and second, to identify sets of teacher beliefs and practices that were good predictors of academic optimism. With a diverse sample of American elementary teachers, a second-order principal components analysis supported the hypothesis that academic optimism was a general construct composed of efficacy, trust, and academic emphasis. In addition, dispositional optimism, humanistic classroom management, student-centred beliefs and practices, and organizational citizenship behaviour were individually and collectively related to the explanation of a teacher's sense of academic optimism, controlling for SES.