While interest in career optimism has grown steadily in the last 15 years, most of its investigations rely on cross-sectional convenience samples that prevent exploring how earlier optimism matters for later educational and vocational outcomes. To address this issue, I use structural equation modelling to assess measurement invariance and the…

This dissertation investigates the inequitable distribution and causal impacts of mathematics teachers' content knowledge for teaching (CKT) on instructional quality and student learning outcomes. Using the rich information in the Measures of Effective Teaching (MET) project longitudinal database, the study addresses three core research questions:…