Textbooks are generally divided into two sizes. The large textbook is basically 16, with the size of 185mm* 160mm, and the small textbook is basically 32, with the size of184 mm *130 mm. According to reports, it is stipulated in the textbook standards for primary and secondary schools in China.

Textbook definition

Textbooks, also known as textbooks and textbooks, are teaching books written according to the requirements of curriculum standards. Textbook is the core textbook of a course. It mainly consists of contents, texts, exercises, experiments, charts, notes and appendices.

Textbooks are the concretization of curriculum standards, which are usually divided into books, units or chapters according to academic year or semester. Texts are the main part of textbooks and an important symbol to measure the basic education level of a country or region. Broadly speaking, all activities that enhance people's knowledge and skills and affect people's ideology and morality are education.

The textbook in a narrow sense is a textbook, which is the core textbook of a course. Broadly speaking, all activities that enhance people's knowledge and skills and affect people's ideology and morality are teaching materials.

Teaching books written according to the requirements of curriculum standards. Also known as textbooks and teaching materials.