The textbooks are divided into two volumes: Textbook I (Lessons 1—12) and Textbook II (Lessons 13—23). Each volume consists of two sections: “Dialogue and Grammar” and “Reading and Writing.” The CD accompanying each textbook contains six hours of audio material in MP3 files. Pauses are inserted in the Dialogue, Vocabulary, and Practice audio material to give students time to pronounce the utterances, thus helping them to study more effectively.