This document discusses teaching and learning in large classes. It begins by noting that what constitutes a large class can vary by discipline or pedagogical needs. Large classes pose engagement challenges for both students and faculty. The document reviews principles and strategies for effective large class instruction from various universities, such as encouraging contact between students and faculty and active learning. It notes that large classes can provide pedagogical value when the right approaches are used. Student perspectives are shared on what they like and dislike about large classes as well as their recommendations. The challenge is addressing perceptions that large classes cannot effectively support learning.