Abstract
This study aims at developing problems which valid and practical and to know the potential effect of those problems in regards of students mathematical reasoning ability. The subject of this research is student in AR-RAIHAN Junior High School Bandar Lampung. This study is a development research which consists of two stages, preliminary and prototyping stages. In the preliminary stage, analysis for the research subject, curriculum, and theory of the levels in PISA were conducted. In prototype stage formative evaluation of the problems were conducted by self evaluation, one-to-one, experts review, small group, and field test. The techniques of the data collection in this study are walk through (expert review stage) for knowing the validity of the contents, constructs, and languages. the interview (field test) and questionnaire (small group and field test) for knowing practicality of the problems, and questionnaire (field test) and interview (field test) for knowing potential effect mathematical reasoning ability of students. Based on the result of the questionnaire which measure the reasoning and argumentation abilities of the students, recognized by most of the student (90,91%) is used in resolving the problem furthermore on data analysis of this study the PISA-like problems level 4 to 6 has a potential effect on supporting/improving students reasoning ability
Keywords : development research, PISA-like problems junior high school, level 4, 5, 6 of PISA
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