| Summary: | Thesis advisor: Lillie R. Albert === Why do mathematics teachers’ beliefs and instructional practices differ, and why are some teachers’ beliefs aligned or misaligned with their instructional practices? This qualitative case study investigated how eight Korean elementary teachers’ sociocultural life stories shaped their mathematical beliefs and practices. The specific aim was to explore through mathematics-related life stories the relationship between the elementary teachers’ mathematical beliefs and instructional practices. The overarching research question was: “How does a theoretical model based on sociocultural theory (Albert, 2012; Vygotsky, 1978) explain the relationship among the Korean elementary teachers’ life stories, the development of their beliefs, and their instructional practices?” The findings of this study indicate that the teachers’ attribution of their unsuccessful teaching experiences contributed to their perception about the value of continuing their own learning and development, which, sequentially, influenced the construction of their current beliefs about mathematics teaching and learning. Their pedagogical beliefs for teaching mathematics were likely to have an impact on their attitude toward implementing student-centered or teacher-centered instructional practices. Additionally, the teachers’ knowledge and self-efficacy beliefs about teaching mathematics influenced this relationship, resulting in different levels of alignment and even misalignment. Thus, teachers used their past mathematics learning and teaching experiences to justify their current beliefs and practices and to explain their classroom culture. These findings resonate with scholarship pertaining to mathematics teachers’ knowledge, beliefs, and instructional practices and contribute further to their developing theory about teachers’ life stories by illustrating how teachers’ life stories play out in a complex mathematics classroom environment. === Thesis (PhD) — Boston College, 2019. === Submitted to: Boston College. Lynch School of Education. === Discipline: Teacher Education, Special Education, Curriculum and Instruction.
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