This research investigates the professional life histories of upper elementary science teachers who were identified as effective both within the classroom and in the outdoor learning environment (OLE). The narratives of five teachers collected through semi-structured and open-ended interviews provided the data for the study. Professional life histories were constructed for each teacher participant and an analysis of the teacher narratives identified the themes of teacher development across the voices of the participants. These primary themes were based on a framework for teacher development by Hammerness et al. (2005) that posits that teachers develop within a community where they construct a vision for their practice; understandings of teaching, learning, and children; dispositions about how to use their knowledge; practices that bring together their intentions and beliefs; and tools to support their work. Implications of the research can be realized for stakeholders in the preparation of pre-service teachers as well as the development of in-service teachers. Future research regarding the early induction years of new teachers, impacts of inclusion of the OLE in pre-service teacher instruction, and teacher experiences regarding professional development relating to efforts to include the OLE in formal education should be investigated. [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://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]