This document summarizes and reviews a research article examining the existence of shadow education in South Korea. It provides background on shadow education and discusses how it has become a major policy issue in South Korea. While government policies have aimed to limit private tutoring, it continues to grow due to factors such as low-quality formal schooling, students' desire to improve grades and exam scores, and reaction to education reforms. The document also discusses criticisms of shadow education, including that it can reduce student engagement, place financial burdens on families, and exacerbate inequality.