The aims of this classroom action research are to describe: (1) the implementation of cooperative learning model "find someone who and flashcard game" to boost students' motivation to learn social studies for the fifth grade students; (2) the response of the fifth grade students at SDN Klanderan, Kediri, East Java on the implementation of "find someone who and flashcard game". The subjects of this study were 32 students. The study was conducted in one cycle. Then the data collecting in this study was done by using observations, questionnaires, and interviews. Research data analysis technique was done by using qualitative descriptive. The conclusion of this study are: (1) students' motivation to learn social studies for the fifth grader at SDN Klanderan improved that can be seen through the achievement aspect of the successful expectation, persistence of effort in learning, as well as the ability to face and overcome the failures of learning and (2) the fifth grade students at SDN Klanderan responds "find someone who and flashcard game" of learning with fun, the spirit of thinking, and agree.