The study developed multiple independent scales of early childhood teacher experiences (ECTES). ECTES was co-constructed with preschool, kindergarten, and first grade teachers in a large urban school district. Demographic, ECTES, and teaching practices data were collected from 584 teachers. Factor analyses documented three teacher experience constructs: Teacher Efficacy, Job Stress, and School Support. Findings showed differences in teaching practices based on ECTES dimensions in hypothesized directions. Teachers experiencing higher levels of stress spent less time teaching literacy and numeracy and interacting with parents, whereas teachers experiencing higher levels of efficacy spent increased time teaching both cognitive skills and social-emotional skills and communicating with parents. Analyses of program differences in these measures showed that first grade teachers reported the highest level of stress and that kindergarten and Head Start teachers were more likely to feel efficacious than were first grade teachers or other preschool teachers in child care settings. (Contains 3 tables.)