This document provides an overview for a multi-lesson unit on the Cold War for high school students. Lesson 1 focuses on the Truman Doctrine and has students research and present on its impact. Lesson 2 examines new communist regimes in Asia and has students write persuasive letters. Lesson 3 analyzes the role of geography in US containment policy and has students identify countries at risk of communist influence. Students use online resources and tools like Google Slides, Hangouts, and interactive maps for research, collaboration, and presenting their work.