Introduction and purpose: Teachers 'teaching methods play an irreplaceable role in students' learning process. Accordingly, the present study aims to determine  the  components  and  framework  of  teaching  pattern  of  primary  school based on the  teaching  content  to develop  the  lesson  study  model  and  estimate its  internal  validity.
Material and Methods: The research method was mixed exploratory. In qualitative  phase,  the  inductive  content  analysis  was  used  to  obtain  the teaching pattern, and  in  the  quantitative  phase,  the survey  method was utilized for  estimating internal validity. The statistical population of the qualitative phase comprised  written  resources  and the teaching  videos  of  selected  projects  of  lesson study planning and the quantitative phase comprised experts and professors  of  lesson study and  teaching method  of  primary  school books. In both phases, samples were selected purposefully.  In  qualitative  phase,  124  selected  videos  of teaching  the  lesson study  project  in  a four  year  interval ( from 2015 to 2016 and from 2018 to 2019) were  analyzed.  In quantitative   phase, 34  experts  and  professors  of  teaching  method  of  textbooks  and  teaching  method  in  universities  were selected. The qualitative  data  were collected by  analyzing  the  content  of  resources  and  selected  videos and the quantitative data were collected by the research-made questionnaire.
Findings: The result of content analysis revealed seven types of content and the conceptual pattern was proposed and the videos were classified accordingly.  Following  content  analysis and  code  extraction,  components  were  extracted  and   presented  in form  of  pattern of  teaching  steps appropriate for various  content.
Conclusion: Results  from  internal  validation  revealed  that  the proposed teaching  pattern has  high  internal validity  and is  appropriate for teaching primary  school students.