The background in this research is the low science achievement of third grade students SDN 42 Pekanbaru. Average score of the students before the action has not reached the established KKM, the average score of students is 61,67 with KKM 70. Among 36 students, only 15 students who reached KKM with 70% classical completeness. This research is a Classroom Action Research (CAR) that conducted to i…