The purpose of this study was to investigate the effect of a community service activity on improving teachers' pedagogic competence in Bawean Island of Gresik Regency, Indonesia. The treatment method was based on a model of special education profession in a remote island by implementing lesson study activity introduced and developed previously on different period of community services. The samples of this activity were teachers from a Junior High School and a Senior High School in Tambak, sub-district of Bawean Island. Ten teachers from those two schools were chosen using snowball sampling technique. The data collection methods used were observation and interview. The lesson study activity implemented three cycles with stages such as Plan, Do and See. The results of this community service program indicate that there is an improvement in pedagogic trait of teacher competence as shown in teacher skills in developing teaching and learning plans, implementing learning and evaluating learning.