<![CDATA[This quasi-experimental research aims to find out the effectiveness of Jigsaw cooperative learning model considered by student’s mathematical problem solving ability. The population of this research is eighth grade students in second semester of Junior High School State 13 Bandar Lampung in 2012/2013 academic years and as the samples are VIII.A and VIII.C, that are selected from eleven classes by using purposive sampling technique. Based on the analysis of the student’s mathematical problem solving ability, it is known that the ability of student’s mathematical problem solving with Jigsaw cooperative learning model is better than the ability of student’s mathematical problem solving with conventional learning, and also 65% or more students who are taught by Jigsaw cooperative learning model have achieved KKM. The conclusion from this research is Jigsaw cooperative learning model effective considered by student’s mathematical problem solving ability in eighth grade students of even semester Junior High School State 13 Bandar Lampung in 2012/2013 academic years. Keywords: Jigsaw, Problem Solving]]>
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