This study is a case study that observes the effect that unplugged cooperative learning in information communication application classes, which are offered as a basic curriculum selective course, have on the algorithm learning and social skills of high school students with intellectual disabilities. Six students attending special classes in High School in Gyeonggido were divided into two groups of three and units related to basic algorithm principles of basic curriculum information and communications utilization high school textbooks were taught over a course of twelve sessions with block time classes of two sessions each. Of the twelve sessions, six applied the STAD cooperative learning model and the other six applied the TGT cooperative learning model. With pre and post designs, test results from an algorithm scholastic achievement evaluation, a social skill rating scale, and a social skill behavior observation scale showed that unplugged cooperative learning improves algorithm study achievement and social skills (self-assertiveness, cooperation, self-control). This study is significant in that it made attempts in educational sites, applying unplugged methods and cooperative learning, which are information subject teaching and learning methods.