“…Research on teacher skills to train students' critical thinking has not been done much. In Indonesia, research on critical thinking currently focuses on the application of various learning methods to improve students' critical thinking skills (Sari & Sugiyarto, 2015;Syarifah & Sumardi, 2015;Muskitta & Djukri, 2016;Nugroho, 2017), development of activity sheets for students' critical thinking (Asmawati, 2015;Firdaus & Wilujeng, 2018), developing students' critical thinking instruments (Nawawi & Wijayanti, 2018;Nuryanti et al, 2018), and the development of media and learning based on local wisdom in improving students' critical thinking (Anisa, 2017;Supandi & Senam, 2019).…”