Science education theory and reform call on elementary educators to provide authentic science learning experiences in a constructivist learning environment. The natural surroundings of the schoolyard offer an often undeveloped and/or undiscovered pedagogical tool that can help teachers meet these reform-based goals in science teaching. There is little research investigating the pedagogical development of teachers who use the schoolyard to teach. Understanding the framework of development of schoolyard pedagogy can help pre- and in-service teacher educators prepare effective elementary science teachers to take advantage of the teaching opportunities in the schoolyard. This manuscript constructs a framework of development of schoolyard pedagogy as described in the themes of experience across the professional life histories of elementary teachers who frequently use the schoolyard to teach. This framework can inform both pre- and in-service teacher educators who aim to support the development of a pedagogy that goes beyond the four walls of a classroom.