Lesson 21 of Minna no Nihongo I focuses on helping beginners communicate about daily activities, hobbies, and personal interests. This lesson emphasizes describing what you do in your free time, asking about others’ activities, and using polite expressions in conversations about hobbies. Learners are encouraged to practice vocabulary in context, combining verbs, nouns, and polite forms to form complete sentences for daily life and leisure topics. Strategies include repetition, practicing dialogues, role-playing conversations about hobbies and activities, and integrating expressions into personal routines, which strengthen comprehension and practical usage. Practicing Lesson 21 content allows learners to talk about their hobbies, ask about others’ interests, and engage in polite conversations about daily life, forming a strong foundation for social interactions in Japanese.