Humanoid robots in education present both promising opportunities and considerable risks. This review explores the use of humanoid robots in formal education, focusing on pedagogical approaches, impact, challenges, and ethical considerations. Most studies employed constructivist and socio-cultural approaches, such as problem-based and game-based learning. The results revealed that humanoid robots enhance learning effectiveness, student engagement, motivation, enjoyment, confidence, and 21st-century skills. However, privacy, data security, and reduced engagement with people due to over-reliance on robots remain ethical concerns. Implementation challenges include technical issues, high costs, and a lack of trained personnel. The review offers recommendations for implementation, future directions, and research to guide the responsible and effective integration of robots into formal education.