The sampling technique that used is multistage sampling and data validation using observer triangulation. The document that analyzed are questions in the chemistry textbook used by eleventh grade students at four Senior High Schools in Surakarta. This study is a qualitative research using descriptive documentation analysis method or content analysis.
This study aims to determine the indicators of critical thinking skills that developed in the questions that contained in the XI grade high school chemistry textbook and to determine the critical thinking level of the questions developed in the XI high school chemistry textbook.
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