This study aims to determine the effect of scientific method using project method on student’s achievement. This research was conducted at SMPN 2 Karanganyar. The descriptive quantitative method was used in this research. Samples were taken two classes using cluster random sampling. Data was obtained based on cognitive instruments. This data represents the value pretest and posttest. Data was analyzed by using descriptive analysis techniques. The results show that the class which using scientific method using project method has an average value of 37.50% of students’ achievement (high), 37.50% (moderate) and 4.16% (very low). On the other hand, the class which using one method, scientific method, have the students’ achievement at 33.3% (high), 8.33% (moderate) and 20.83% (very low).

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