This study aims at evaluating the effectiveness of review horay cooperative learning model with power point media to improve critical thinking skills and student activities. The research used evaluation sheet and observation sheet. The participants were 50 fourth grade elementary school students in Sidodadi Elementary School, Surabaya, who were divided into two classes. This study found that Course Review Horay with power point media was effective in two parameters. The first parameter was the student activity which showed that the students were actively involved during the learning activities. The second parameter was the critical thinking skills which explained that all the phases in the Course Review Horay model with power point were at a very good level. Their dominant activities were solving problems, discussing, and collaborating. The finding of the evaluation of this model and media had been effectively applied in elementary schools.