“…This step is in line with the experts' opinion that lesson study aims to reflect the learning process (Dudley, 2013;Lewis, 2009;Matanluk, Johari, & Matanluk, 2013;Zorofi, 2010). The redesign proposed by expert lecturers for this research will increase teachers' professionalism, beliefs, reflections, and attitudes (Harisman, Kusumah, & Kusnandi, 2018, 2019a, 2019cNovikasari & Dede, 2021). Specifically, a lesson study brings several impacts, including changing the learning process, taking the contexts of learning, offering best experience for teachers who apply this method, and assisting colleagues (Isoda, 2010;Parks, 2008;Post & Varoz, 2008;Sims & Walsh, 2009).…”