This research was aimed at: 1) enhancing practice of microteaching for Thai-teaching major students to assure their readiness in organizing instruction during the spread of COVID-19 virus situation, and, 2) providing guideline for carrying out microteaching for students majoring Thai teaching to assure their readiness in organizing instruction in the midst of the spread of COVID-19 virus situation. This research had utilized qualitative research methodology for the study. The sample subject used were selectively selected from Thai-teaching major 4th year undergraduate students (61 code number) who had registered in the course 100488 MICRO TEACHING PRACTICE, in 2nd semester, 2021 academic year, totaling 8 subjects. The research instruments included 1) plans and schedule for instructional organization on microteaching, 2) worksheet for organizing microteaching learning plans, 3) form for recording the instructional preparation for each skill, 4) self-assessment form, 5) student’s feedback form, 6) teaching observation form, 7) post-instruction reflection form, 8) group discussion, 9) individual student interview, and, 10) reflection form to be responded by students at the end of the course. The qualitative data were analyzed via content analysis on the findings obtained from observation, interviews, focus group discussion, student’s instructional practice and their performance outcomes.
 
 Outcomes of the research are as follows. Firstly, actions to help enable students could come in form of: 1) enhancing new knowledge and learning experience, 2) comparing what occurring to the students between pre-instruction and post-instruction to see if and how students changed, improved, developed, themselves, 3) promoting microteaching practicum to enable students to train themselves on communication skills, skill in constructing instructional media, teaching skills, and thinking skills, and, 4) As the results of utilizing microteaching practicum, students had gained knowledge and readiness in carrying out online instruction. Secondly, the researcher had proposed the guideline called “9 pinciples for facilitating microteaching practice for Thai-teaching major students to gain readiness in organizing instruction in the spread of COVID-19 virus situation.”
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