This study aims
to develop assessment instruments in Indonesian version of Realistic
Mathematics Education (PMRI) with the topic special quadrilateral including the
aspect of validity, of practicality, and of the effectivity. The methodology
that use in this study is a developmental research. This form of research
consists of self evaluation and prototyping. The subject of this study is 32
students of the first grade of SMPN 17 Palembang. Experts review, and
documentary analysis were used incollecting data. For evaluating process,
observation sheet, learning log, the use of student’s strategy and solution
from the result of their achievement. The collected data were analyzed using
qualitative descriptive. The findings show that assessment instruments in PMRI
in the topic special quadrilaterals could be categorized as valid, practical,
and effective. The validity is measured by using the aspects of contents, contruction,
and language based on assessment’s principles of PMRI. Based on the experts
coments, the assesement instruments developed can be practically in the
teaching learning process. According to the observer, the observation sheet and
learning log show that students are motivated to be individual or group in
doing the exercises. The effectivity is analyzed operationally that is to see
student’s ability when the instruments are trying out including the process and
the products. Students can argue either orally or writen.
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