<![CDATA[The learning process of Mathematic in a conventional way took place in classroom was dominated by a teacher and gave less opportunity for the students to be more active in the learning process. Problem Based Learning by using Authentic Assessment is one of the alternatives to improve students’ activity in solving problems. This is a classroom action research. This research is focused on the improvement of students in problem solving; and improve the students’ activity. The instrument in this research consists of test in solving problem in Equation and Quadratic Function. Data Processing is done to find out the improvement of problem solving ability, students’ activity and teachers’ ability in managing teaching learning process. The result of the research shows: (1) The application of problem based learning by using authentic assessment improves the problem solving ability of mathematics. On 1st cycle, it is found 62.5% from the students has the ability of problem solving in the average of moderate. On 2nd cycle 85% of the students gets the average of moderate. (2) It is concluded that the students’ problem solving ability and the level of students’ activity are improve.]]>
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