<![CDATA[The average value of chemistry learning outcomes and social attitudes is still low as the background of this study, so this study aims to improve the learning outcomes and social attitudes of the students by using the J-Trow cooperative learning model integrated peer assessment of material solution. This research is a classroom action research which consisted of two cycles, with pre-cycle data taken from the students data on the previous basic competencies. The data analysis using descriptive comparative techniques by comparing data cycle I and cycle II. The results showed that there was an increasing in students' social attitudes and the number of students who achieved minimal completeness was 29.2%. The student’s average learning outcomes increased from 58.98 in the first cycle and 70.20 in the second cycle. Students' responses to learning showed a positive response, which is more than 50% of students give good responses.]]>
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