Книга: Step by Step Chinese Intensive Elementary 2 +CD

These 2 textbooks are designed for beginners. Textbook 1 (40 lessons) is for the first term and textbook 2 (40 lessons) for the second term.
Stage 1: Lesson 1 - 20, about 20 new words in each lesson;
Stage 2: Lesson 21 - 40, about 30 new words in each lesson;
Stage 3: Lesson 41 - 80, about 40-50 new words in each lesson.
Language: Chinese.