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The reflective thinking ability is the students' ability to actively think through rules cautiously to answer questions. The reflective thinking ability is also one of the higher order thinking skills (HOTS) demanded of learners. Through applying the newest national curriculum, the Indonesian government wants students to master the 21st century skills. The types of skills are communication, collaboration, critical thinking and problem solving, and creativity and innovation. This study aims to reveal the students' reflective thinking characteristics with the qualitative method and the descriptive design. Data collection used instruments of test and interview. Subjects in this study were three students of class XI at Senior High School. The research subjects, based on the mathematical ability, were divided into three categories, that are high, medium and low. While the reflective thinking ability is divided into four stages: habitual action, understanding, reflection and critical reflection. The results showed that the student with the high level is at the stage of reflection, the student with the medium level is at the stage of understanding, and the student with the low level is at the stage of habitual action. It can be concluded that students' reflective thinking ability is not yet developed optimally.
Salido et al. (Fri,) studied this question.