Abstrak^.. Telah dilaksanakan penelitian dengan menerapkan pembelajaran model  Learning Cycle 6E berbasis multi-representasi materi asam basa. Tujuan penelitian meningkatkan keterampilan berpikir   kritis peserta didik kelas XI MIPA 4 SMAN 2 Banjarmasin sebanyak 36 peserta didik Tahun Ajaran 2019/2020. Penelitian ini merupakan Penelitian Tindakan Kelas dengan instrumen penilaian berupa tes dan non tes. Faktor yang diteliti berupa (1) aktivitas guru, (2) aktivitas peserta didik, (3) keterampilan berpikir kritis dan (4) respon. Teknik pengumpulan data dengan teknik observasi, teknik angket dan tes keterampilan berpikir kritis. Hasil penelitian menunjukan bahwa (1) Aktivitas guru pada siklus I dengan skor 54,67 meningkat menjadi skor 63,34 pada kategori aktif pada siklus II, (2) Aktivitas peserta didik siklus I dengan6 skor 54,21 meningkat menjadi skor 65,08 pada kategori sangat aktif pada siklus II (3) Keterampilan berpikir kritis peserta didik siklus I dengan persentase rata-rata 41,11% kategori cukup kemudian naik menjadi 81,48% pada kategori sangat kritispada siklus II, (4) Respon peserta didik menunjukan kategori baik. Model pembelajaran Learning Cycle 6E berbasis Multiple Representasidari hasil penelitian diketahui mampu meningkatkan keterampilan berpikir kritis peserta didik pada materi asam basa.

Kata kunci:Keterampilan berpikir kritis, Learning Cycle 6E, Multiple Represesntasi, Asam Basa

Abstract.  Research has been conducted using the Learning Cycle 6E learning model based on Multiple Representations of acid-base material. The purpose of the study was to improve the critical thinking kills of students of class XI MIPA 4 of SMAN 2 Banjarmasin by 36 students in Academic Year 2019/2020. This research is a Class Action Research conducted with assessment instruments in the form of tests and non-tests. The factors studied were (1) teacher activity, (2) student activity, (3) critical thinking skills and (4) response. Data collection techniques with observation techniques, students 'questionnaire techniques and tests in the form of students' critical thinking skills results. The results showed that (1) Teacher activity in the implementation of the action had increased in the first cycle with a score of 54.67 increasing to a score of 63.34 in the active category, (2) The activity of the students had increased in the first cycle with a score of 54.21 increasing to score 65.08 in the very active category (3) Students 'critical thinking skills in the first cycle with an average percentage of 41.11% with sufficient criteria to increase to 81.48% in the very critical category, (4) The students' response results show good category. Based on the research results it can be seen that the Learning Cycle 6E learning model based on Multiple Representations can improve students' critical thinking skills on acid-base material.

Keywords: Critical thinking skills,  Learning Cycle 6e,  Multiple Represesntasi,  acid base