This is a two-hour ESL adult conversation lesson about the codes that surround us, it includes 2 PowerPoints, worksheets, and teacher’s notes. Codes are all around us and they serve multiple functions. We use them to save time, to create alliances, to make things more efficient, and to share secret messages. Codes are usually culturally dependent, which is why they provide a great cross-culture topic.In part one, we discuss historic and emergency codes, why they are important, and how we use the