“Em Tìm Hiểu Khoa Học – Lớp Năm”(1965), published by the Ministry of Education of the Republic of Vietnam, is a primary school science textbook officially designed for Lớp Năm, which is equivalent to first grade today. It introduces young learners to the fundamentals of natural science through observation, questioning, storytelling, and simple experiments. The book follows two characters, Mỹ and Lê, as they explore questions about life, nature, seasons, and the environment.