This document discusses four types of communication: intrapersonal (communication within oneself), interpersonal (between two people or small groups), public (presenting to a larger audience), and mass communication (through media). Intrapersonal involves self-thoughts and reflection. Interpersonal includes dyadic communication between two people or small group discussion. Public communication requires delivering a message to a larger audience using amplified voice, gestures, and potentially visual aids. Mass communication transmits information to broad audiences via television, radio, newspapers and the internet. The document provides examples of each type and instructs students to compare and discuss the differences in a graphic organizer.