Abstract
The purpose of this study was to develop performance assessment instruments and their application to high school practicum for enthalpy change. The instrument used is a validation sheet to see the validity. The instrument that has been analyzed is a performance assessment about students’ laboratory skills in enthalpy change (ΔH) laboratory activity. The method used in the research was development and validation. The instrument was evaluated by 8 teachers and 32 students of year XI from one of senior high school in Bandung. The result shows that there is a similarity of the score given by students and that the teacher. This similarity is supported by the pearson correlation score r=0,89 have been categorized as very good. This result implies that performance skills can be administered by peers using this instrument since it provide the similar result with the teachers.
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