The material aims to help primary cooperatives in dealing with their membership. It covers several key and relevant concepts on membership classification based on certain criterias, as well as some brief but practical challenges and issues related to cooperative membership that may assist the readers in assessing the personalities, motivations, and performance of its members. Most of the articulated standards and policies are also provided in this book, as required by Cooperative Development Authority. Some interactive and capacity-building activities, and competency-enhancing programs are also presented for membership growth and development.