<![CDATA[This study aims to: 1) determine the effectiveness of the scientific approach to the science process skills of students of XII class of SMAN 4 Watampone; 2) determine the effectiveness of the scientific approach to biology cognitive learning outcomes of students of XII class of SMAN 4 Watampone. The research is a pre-experiment with the One-Group Pretest-Post test design, the treatment given purporsive on the experimental group. The technique of collecting data for the dependent variable is done by using the instrument in the form of observation sheet that comes with assessment rubric for science process skills, and instruments such as achievement test form MCQs for biological cognitive learning outcome data. Analysis of the data usedis descriptive analysis with N-Gain. The result showed that the science process skills including high category with an average score of the 11 indicators of the ability of 3.78 and a standard deviation of 0.47. Cognitive learning outcomes before and after treatment biology scientific approach gained an average increase in scores or deviation of 36.5 and a standard deviation of 5.524, meaning that the average learner can add the number of correct answers about 9 of 10 items. It means that scientific approach quite effective for improving the cognitive learning biology of students of XII class of SMAN 4 Watampone. The effectiveness of the scientific approach to the advancement of the cognitive learning category moderately N-gain value 0.578. If grouped by medium and high groups showed that the average value of the N-gain medium group was 0.549 was the average N-gain high-groups of 0.744]]>
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