This document discusses trends, fads, and critical thinking in the 21st century. It provides definitions of trends and fads, noting that trends last longer while fads are short-lived. Elements of trends include staying power over time, widespread adoption, and influencing beliefs and behaviors. The document also examines how culture and media shape trends. Students are asked to identify examples as trends or fads and analyze how trends gain popularity. They must also consider the role of technology like cellphones in defining 21st century culture.