This document discusses the structure and components of open distance learning (ODL) course materials. It begins by explaining how ODL materials differ from traditional textbooks in being specially designed for distance learning students. It then outlines the objectives of understanding how ODL materials differ from textbooks, learning the devices included in ODL materials, and listing the components of ODL materials. The document proceeds to describe the typical structure of ODL materials, including a wide range of embedded learning devices, relatively less text compared to devices, space for learner answers, and a generous layout. Finally, it provides examples of ODL course structures and unit contents to illustrate these concepts.