textbook

[1] Textbooks can be divided into broad sense and narrow sense. Teaching materials in a broad sense refer to all teaching materials used by teachers and students in and out of class, such as textbooks, exercise books, activity books, story books, supplementary exercises, counseling materials, self-study manuals, audio tapes, video tapes, computer CDs, photocopies, newspapers and magazines, radio and television programs, slides, photos, cards, teaching objects, etc. Materials written or designed by teachers themselves can also be called teaching materials. In addition, the learning materials used on the computer network are also teaching materials. In short, textbooks in a broad sense are not necessarily bound or officially published books. Any material that helps learners to increase their knowledge or develop their skills can be called a textbook. Textbook is the core textbook of a course. Nowadays, in addition to students' books, all textbooks are equipped with teachers' books, and many of them are also equipped with exercise books, activity books, supporting reading materials, wall charts, cards, audio-visual tapes and so on.