Teacher leadership (TL) research has often failed to investigate equity and social justice as well as to consider national contexts and cultural differences. This study examines the relationship between TL and student achievement while investigating the moderating role of TL on the association between school poverty and student achievement in two…

Every society invests enormous resources to ensure that children grow up with the skills, knowledge, and values that will enable them to be successful. Yet cultures vary in their beliefs about what effective parenting and teaching require. Nurturing children involves a collaboration among parents, teachers, and students and reflects cultural…

This dissertation explores how country-level cultural values are associated with gender differences in the enrollment in and completion of science, technology, engineering, and mathematics (STEM) Massive Open Online Courses (MOOC), national achievement in mathematics and science, and students' science achievement. Study 1 explored how gender-equal…

Cross-national comparisons of responses to survey items are often affected by response style, particularly extreme response style (ERS). ERS varies across cultures, and has the potential to bias inferences in cross-national comparisons. For example, in both PISA and TIMSS assessments, it has been documented that when examined within countries,…