Computerized Testlet Instrument for Assessing Students’ Chemical Literacy in High School
Teaching chemistry must contribute to students’ chemical literacy skills. However, the teacher pays a little attention to preparing assessment instruments to measure these skills. This research aims to assess students’ chemical literacy skills by using a computerized testlet assessment instrument. The purpose-designed survey method was used in this research. The subjects used in this study were 240 students from 3 different representative schools in Boyolali, Central Java, Indonesia. This instrument was developed in the form of multiple choice, which is arranged hierarchically and consists of 10 stem and 30 supporting questions. Hypertext Preprocessor programming language was used to develop the computerized testlet assessment instrument. The analysis menu provided on this instrument includes analysis of item quality of students’ chemical literacy skills The research result proves that the computerized testlet instrument facilitates the process of assessing for the teacher. The quality of the items used and students’ chemical literacy skills can be analyzed automatically. The students have good chemical literacy skills in the indicators of identifying questions and finding scientific information. However, they still have low chemical literacy on the indicators of interpreting scientific evidence and drawing conclusions. This research provides novelty to the types of instruments used to measure students’ chemical literacy skills.
Keywords: assessment instrument, chemical literacy, computerized testlet.
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