Rohim ., Rochmiyati ., Caswita .


The problem of this research is that the portfolio assessment instruments have not been implemented in Mathematics subject appropriately. The research objective is to develop a learning model of portfolio assessment on Mathematics subject based on an effective problem-based learning. This research was carried out at SDN 01 Tanjung Rejo and SDN 02 Tanjung Rejo sub-district of Negeri Agung, Way Kanan regency. This research applied Research and Developmet (R & D) method with stages adopted from Borg & Gall. The population and sample size are taken from 30 respondents. The data collection techniques were carried out with questionnaires and tests. The product results are validated by experts of media, material and language. The instrument is being analyzed by item validity and reliability. The results of the research showed that based on the validity by experts of media, material and language, the developed instruments have been proven 'excellent' and 'good' so that it is suitable for use. The results of the large-scale trial of the developed product and the testing showed that the instrument has a good quality so that it can be used to measure the cognitive abilities of fifth grade students of elementary school.

Keywords: assessment, mathematics, problem based learning

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ISSN (Paper)2224-5804 ISSN (Online)2225-0522

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