This lesson plan is for a 60-minute English class for 13-16 year old Thai students at an intermediate proficiency level. The lesson focuses on listening skills and the use of modals. Students will listen to an audio about Couchsurfing and cultural exchange. They will work in groups to understand the audio, answer comprehension questions, and discuss advantages and disadvantages of smartphone use. Finally, students will role play welcoming a Couchsurfer by using modals appropriately. The goal is for students to improve their listening comprehension and ability to use modals in context.