This extended literature review explores four broad themes concerning mathematics education, the first of which is on how U.S. school-aged children have been performing in mathematics at the national and international levels. Findings demonstrated that at the national level, their performance has been stagnant for many decades for high school…

Data mining has been successfully used by financial and retail companies since the mid-1960's to create predictive models and reveal unexpected relationships. However, it remains underutilized as a tool in educational research. Large-scale standardized assessment programs such as the Trends in International Mathematics and Science Study (TIMSS)…

The purpose of this study was to explore teachers' perspectives of working with students with Attention Deficit Hyperactivity Disorder (ADHD) with two hundred twenty-eight K-12th grade teachers in Korea and the U.S. by using a concept mapping methodology. The four research questions were: (1) How do teachers in two different cultures (Korea and…

This dissertation analyzes the effects of the educational programs for students who need special care in secondary and postsecondary school. These educational programs present serious endogeneity problems to a researcher estimating their causal effects, because most of students tried to avoid these programs. I extend the current literature in the…

This study examines the unique experiences of international Korean college students in the Midwest who have gone through the early study abroad (ESA) period in the US during their formative secondary school education and the influence of the experiences into their college lives in the mega campus. Two overarching research questions are: 1) how do…