<![CDATA[Classroom action research has been conducted using the type of modified Jigsaw cooperative learning model to improve student learning and activities of seventh grade SMP Muara Uya 2 on ecosystem,exactly concept of component-component, the units in ecosystem and food chain, and food webs. The research goals to improve student learning outcomes and activities, and to know the student's responses to the learning process. Classroom action research carried out by two cycles, first cycle conducted two meetings and the second cycle is done in one session. The second cycle is an improvement from the first cycle with the advanced content of the same subject matter that is the ecosystem. The results showed that by using cooperative learning model of the type of modification Jigsaw, all students involved in the group as a model organism in the ecosystem, increased activity, activeness, and the responses of students were positive to the model that increase student learning outcomes. Increased student learning outcome classically results achieved from 42.86% to 85.72%, as well as student’s responses to be positive because the number of categories to choose the percentage of agree and strongly agree more than 50% of the categories do not agree and do not answer . the Jigsaw cooperative models use a modified type (there puzlle) can increase the activity, the responses of students in the Learning Process so that learning outcomes are achieved in accordance with the desired.Key Word: modification jigsaw, component-component, units in ecosystem, ecosystem, food chain, food web.]]>
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