This document discusses self-instructional modules as an educational tool. It defines self-instruction as self-contained instructional activities that allow learners to progress independently at their own pace. A module is a self-contained learning package focused on a specific topic. The document outlines advantages of self-instructional modules such as allowing independent study and self-pacing, as well as limitations like lack of face-to-face interaction and discipline. It concludes that self-learning modules can create an effective learning environment when they provide answers to learner questions and immediate feedback.