The place of reserach at SMP Gotong Royong, Tobelo. This research aims at knowing the students’ output through the constructivism application and to know improving the output after doing the learning process using construtivism. The method used in this reserach was qualitative in the shape of Classroom Action Research (CAR) and using two cycles. Each cycle consisted of planning, doing, and reflection. Based on the result of research, in the cycle 1, the average of the students’ output is 62.08. This value has not get the minimum score or the criterium of minimum completness. In the cycle II, the average of the students’ output is 71.25, this means the students has got minimum score of achievement. The above result shows that the conducted research in cycle I to cycle II get significant improvement.