This document discusses challenges of teaching large classes and techniques for overcoming them. It defines a large class as one with more than 50 students. Teaching large classes is difficult as it requires tremendous effort from the teacher who must work to know students' needs amid high noise levels. Organizing lessons and engaging all learners actively is challenging. However, techniques like training students to work in small groups, pairing weaker with stronger students, optimizing seating arrangements, setting clear rules, and utilizing student assistants can help students learn in large class settings. Teachers must also budget their time carefully and get to know each student.