The overall goal of this dissertation was to examine teacher characteristics, teachers' beliefs, and contextual factors that may motivate teachers' decisions to engage in high quality teacher-child interactions. I use two complementary studies to meet this goal. These two studies provide insight into several aspects of early childhood teachers' and children's interactions including the complexity of the conversations and teachers' supportive practices. Findings from both studies reveal that teachers are selective in how they distribute their time and attention across various types of high-quality interactions with children. Study 1 suggests that teachers' perception of how often children interact with one another motivates their decisions to engage in high quality teacher-child interactions (i.e., facilitate children's peer interactions). Study 2 suggests that teacher well-being, specifically teacher depression, limits the extent to which teachers engage in high quality interactions (i.e., complex conversations with children). Importantly, this dissertation also showed that teachers' motivation for engaging in teacher-child interactions does not stem from their own characteristics or perceptions alone. In addition to these factors, contextual aspects of teacher-child interactions also appear to influence teachers' motivation to engage in high-quality teacher child interactions. Study 1 revealed that the gender composition of the children involved in each teacher-child interaction was associated with the extent to which teachers use facilitative practices, as well as with the direction and magnitude of both quality and frequency effects on teachers' facilitation. Moreover, Study 2 revealed that the relation between teacher depression and complex conversations is changed when teachers and children are engaged in academic activities (e.g., math, books, language) relative to play or routine activities. In both Study 1 and 2, I used a teacher-focused observational coding system. Use of this observational coding system contributes novel, objective information about teacher-child interactions, as prior work on teacher-child interactions has most often relied on teachers' self-reports of how often they interact with students. Findings from this dissertation will contribute new knowledge about teacher and contextual classroom characteristics and teacher-child interactions that will inform efforts to promote positive teacher child interactions and, in turn, student and teacher well-being. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]