The objectives of this research were to; 1) to study the present problems of teachers at Boonyatatpolprasit school of classroom research, 2) to develop teachers of Boonyatatpolprasit school to have knowledge, understanding and be able to conduct research in the classroom. The study had 2 phases.divided into 2 cycles of study. The researcher usesd the operating principles of Kemmis and McTaggart's framework as a process of action, consisted of 4 steps: Planning, Action, Observation, and Reflection. Strategies of development were workshop training, Supervision, and peer supporting supervision. The subjects were 17 Boonyatatpolprasit School teachers who participated voluntarily. The teachers were developed for conducting classroom research according to 5-step research frameworks, namely problem surveying and problem analysis, Defining methods for solving problems, Development of methods or innovations, Applying innovation or methods, Research summary and writing research report. The tools used in the research consisted of Basic research questionnaire test before and after the workshop, interview, assessment form for writing research projects, observation, evaluation form for research report writing. The statistics used for data analysis are percentage, mean (X), standard Deviation (S.D.). The research findings found that: 1) From the use of questionnaires about the current conditions and problems of classroom research of Bunyatatpolprasit School teachers before proceeding to develop classroom research. It was found that teachers lacked of knowledge and understanding in conducting research in the classroom. and unable to conduct research in the classroom. 2) When using development strategies, workshop training, Supervision, peer supporting supervision which proceeded in 2 cycles. Performed in cycle 1 using strategy training workshop and internal supervision. The research group has knowledge and understanding, and can conduct research in the classroom according to the 5-step research framework, consisting of 12 people. But there were 5 teachers had problems about how to do summarizing and writing research reports. Therefore having to develop in the 2nd cycle using strategies peer supporting supervision. Researchers and co-researchers have provided assistance, suggestions, amendments for summarizing research results and writing research completely correct. In summary, development of teacher’ knowledge and understanding about classroom research writing of Bunyatatpolprasit School, Huai Mek district, Kalasin Province on based of 5 research stages by using 1) workshop training 2) Supervision and 3) peer supporting supervision. Which can develop teachers to have knowledge and understanding and be able to do research in the classroom. it can be used to develop teaching and learning to be more effective.