This is Book 3A of the third edition, including a total of 13 lessons. It follows Book 2B and comes to the stage of vocabulary and short passages. Each lesson basically consists of five sections: text, new words, notes, word usage, and exercises. The texts are mostly narrations, developing students' listening, speaking, reading, and writing skills; the number of new words increases gradually; the word usage section explains the usage of words and the comparison of synonyms. The exercises come in diverse types, including comprehension, imitation, communication, etc.