The Kumon Method, developed in Japan, is a systematic, self-guided educational strategy that employs worksheets to build solid foundational proficiencies in math and literacy. This article provides a thorough critique of its key principles, strengths, and weaknesses, integrating evidence from modern studies and actual deployments. By 2025, the program has extended to over 60 countries, aiding millions of students, although some argue its drill-based structure may hinder inventive reasoning (Akter et al., 2025). In Bangladesh, facing issues like overemphasis on memorization, substantial student dropouts, and resource disparities, the Kumon Method might function as a useful add-on to reinforce essential abilities (UNICEF, 2020). Utilizing data from polls, research articles, specialist opinions, and efforts such as the BRAC partnership, this research recommends a modified, long-term approach featuring budget-friendly online components, instructor training, and synchronization with domestic guidelines. It stresses the necessity for adaptations sensitive to local culture to boost effectiveness in growing markets, aligning with Sustainable Development Goal 4 (SDG 4) for fair and superior education (Kumon Group, 2019; Global Partnership for Education, 2020).