This document provides an overview of module 1 of a course on participatory urban planning. It discusses the definitions of urban areas and how they vary globally. In India, the census defines an urban area as having a population over 5,000, a density over 400 persons per square kilometer, and 75% of males engaged in non-agricultural work. The document outlines the course authors and support organizations. It provides the table of contents and overview of the three units that make up the introductory module.