This lesson introduces 10th grade students to the U.S. National Income and Product Accounts (NIPA), exploring the scientific foundations, historical development, and interdisciplinary connections of GDP and GDI. Over a 15-minute flash session, students will analyze the methodology, understand the role of economic, historical, and statistical sciences, and apply critical thinking to evaluate how these accounts guide policy. This lesson helps students see the intersection of economics with history, mathematics, and social studies.