This lesson plan aims to teach intermediate English learners about design through examining flags. It begins with warming students up to the topic of design and having them describe well and poorly designed objects. Students then read about what design is and practice describing designs. They learn adjectives to describe flags and are introduced to flags from around the world. Students then listen to a TED Talk about flag design and identify the speaker's main points. Finally, they work in groups to design a flag for New York City using the principles discussed and present it to the class. For homework, students write a paragraph analyzing an existing flag.