This review investigates the state of teacher self-and collective efficacy research conducted from 1998 to 2009. Two hundred and eighteen empirical articles published in 1998-2009 were examined for key characteristics and compared to research published in the previous 12 years (i.e., 1986-1997). Results from the review show increases in overall teacher efficacy research, methodological diversity, domain specificity, internationalization, and focus on collective efficacy. Continuing problem areas were a lack of attention to the sources of teacher efficacy, continued measurement and conceptual problems, a lack of evidence for the links between teacher efficacy and student outcomes, and uncertain relevance of teacher efficacy research to educational practice. An outline of directions for future teacher efficacy research is provided.Keywords Teachers . Self-efficacy . Collective efficacy Teacher efficacy-the confidence teachers hold about their individual and collective capability to influence student learning-is considered one of the key motivation beliefs influencing teachers' professional behaviors and student learning. In recent years, teacher efficacy research has been described as being "on the verge of maturity" by TschannenMoran et al. (1998, p. 202) and "ready to move beyond adolescent angst" by Henson (2002, p. 148). Certainly, the growth of teacher efficacy research has been rapid since the second half of the 1970s, the period that saw the RAND organization introduce two efficacy items on a teacher questionnaire and Bandura (1977) publish his influential early work on self-efficacy. Over the last 30 odd years, the volume of teacher efficacy research has increased, but questions remain about the direction, quality, and influence resulting from the increased attention given to the construct. Previous reviews and critiques have highlighted key issues that need attention in order for teacher efficacy research to attain maturity (e.g., Goddard et al.