The Vietnamese word "giáo khoa" is a noun that refers to textbooks or educational materials used in schools. These books are designed to help students learn specific subjects, such as mathematics, science, Vietnamese literature, and more.
While "giáo khoa" primarily refers to textbooks, it can also imply the broader concept of educational content or the academic subjects themselves. For instance, when someone says "giáo khoa toán," they are referring to the mathematics curriculum or textbooks.