“…Development of Lesson Study (LS) is based on the didactic situation theory which has the hypothesis that teachers' professional knowledge is developed through action, interaction, formulation, validation, and didactic institutionalization in their learning environment (Wood, 2018). LS reveals a collaborative collaboration among the teachers and other education activists (Chenault, 2017;Gutierez, 2015;Merga, 2019), in which it focuses on the teacher professional learning and students' learning (Coenders & Verhoef, 2019;Purwanti & Hatmanto, 2019;Uştuk & Çomoğlu, 2019). The scope of the LS more leads to ontology on the learning difficulties (Norwich & Jones, 2012;Rappleye & Komatsu, 2017).…”