<![CDATA[This study is based on education that implements the 2013 curriculum, where the 2013 curriculum requires students to think critically. In addition to critical thinking of students to note, other aspects also have not been considered the cognitive style in the learning process. The fact in SMP Muhammadiyah 15 Sedayulawas that science learning is still oriented to the learning outcomes or aspects of knowledge and understanding of the concept, while the empowerment of critical thinking is still not empowered the reality in SMP Muhammadiyah 15 Sedayulawas that science learning is still oriented to learning outcomes or aspects of knowledge and understanding concept, while critical thinking empowerment is still not empowered. In addition to critical thinking that has not been empowered, cognitive style has also not been considered. To improve students' critical thinking, one of them is by using Problem Based Learning model (PBL) with media of Wheel of Luck that can link to environmental pollution material. This research is a descriptive research with the aim to express critical thinking of SMP Muhammadiyah 15 Sedayulawas students based on reflective-implusive cognitive style. The test used in this study is a critical thinking test that refers to the Bloom Taxonomy and Matching Familiar Figure Test (MFFT) indicators referring to Warli (2010) to find out the students' cognitive style. Data analysis technique used is descriptive analysis to analyze data of reflective-implusive cognitive style and non parametric statistical analysis mann whitney test to analyze student's critical thinking result. The results showed that there was a difference of critical thinking between students with cognitive-reflective style with students with cognitive-style implusive, in which students with cognitive-style reflective ability of critical thinking is higher.]]>
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