What term refers to a book intended for general teaching that is not classified as a textbook?

The term that refers to a book intended for general teaching and is not classified as a textbook is a trade book. Trade books are typically written for a general audience and cover a wide range of topics in an engaging manner, often using storytelling techniques and appealing illustrations. They are designed to be informative and enjoyable, making them suitable for both educational purposes and leisure reading.

In the context of education, trade books serve as valuable resources that can supplement standard curricula without adhering strictly to the focused, structured nature of textbooks. They often include fictional and non-fictional works, providing diverse perspectives and enriching students' experiences with content across various subjects. This makes trade books particularly useful in fostering a love of reading and enhancing literacy skills.

Other types of books such as reference books, textbooks, and resource guides serve different specific functions in education, such as providing factual information, structured curriculum content, or instructional aids for teachers.