This document discusses self-instructional modules. It defines self-instruction as instructional activities that guide independent learning at a learner's own pace. A module is a self-contained package that focuses on a specific topic and allows independent study. Advantages of self-instructional modules include learning at one's own time and pace, accessibility of materials, self-pacing, and frequent feedback. Limitations include lack of discipline, face-to-face interaction, slow learning, and lack of input from trainers. The conclusion states that self-learning modules create effective learning environments by containing answers to questions and providing immediate feedback.