In this lesson, students will review vocabulary related to subjects of study and practice the sentence structure “对…感兴趣” (I am interested in…). The instructor reads from lesson 7, unit 3, covering various subjects including history, Chinese, English, mathematics, physics, chemistry, and biology. Students learn that the phrase “几门课” (how many subjects) is used to inquire about the number of classes, with the specific answer being “十门课” (ten lessons). The lesson emphasizes the meanings of terms related to chemistry, explaining that “化” means to change, indicating that chemistry studies changes in matter.