This research was conducted because of the low achievement on science and social subjects of student class IVC SDN 26 Pekanbaru, KKM set at the school is 75. Out of 24 students that reached the KKM only 11 students (45.83%), while students who not reached the KKM were 13 students (54.16%) with average class of 64.79%. To solve the problem, researcher applied the learning model of problem-ba…