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Abstrak :
Research in math education on mathematical creativity relies on the idea that creativity is potentially within all students and it can be fosfered by properly structured activities. The tasks most commonly used for its assessment are problem solving and problem posing. In our approach we use problem posing tasks to get insight into students' creativity. Based on a qualitative analysis of the participants' answers to the questionnaire that the followed the task, we define algorithmic, combined and innovative creativity as constructs that can be put in correspondence with the types and level og knowledge involved in the problem posing task. We propose criteria to identify these types of creativity and discuss aspects related to the quality of the resulting problems. A second set of criteria is defined in order to assess the novelty of the posed problems.

Abstrak :
The objective of the present study is to find out the effect of problem-based performance assessment and instructional models on the students' metacognition in mathematics at senior high schools. The study was conducted in SMU in Jakarta. There were 120 first grade students as the sample of the study, selected through multistage random sampling. The data were gathered by using a metacognition scale. Data analysis was done by using the two way analysis of variance. The results of the study are: (1) In general, problem-based performance assessment effects students' metacognition mathematics, (2) Learning models affect the students' metacognition in mathematics; in which the cooperative learning model is more effective in improving the students' metacognition than the classical learning model, (3) There is an interaction effect between problem-based performance assessment and instructional models. Such interaction show that problem solving performance assessment is more effective in improving students' metacognition in mathematics if it is combined with cooperative learning model; while problem posing performance assessment is more effective if it is combined with classical learning model.