The aim of this study is to evaluate the professional development program on web based content development (WBCD) designed by the Ministry of National Education (MoNE). Based on the theoretical CIPP model by Stufflebeam and Guskey's levels of evaluation, the study was carried out as a case study. The study group consisted of the courses that opened in Izmir in the spring semester of 2009, in which 37 teachers and four trainers attended. Quantitative data for the study was collected by two separate questionnaire forms, while the qualitative data was gathered from focus group and individual interview forms. The quantitative data collected was analyzed using descriptive statistics, while content analysis was applied to the qualitative data. The results of the study showed that the program had been designed without a needs analysis, that teachers were reluctant to implement the program, and that at the end of the program implementation, teachers had not managed to prepare web based instructional materials despite the fact that they had been included in the objectives of the program. In addition, it was found that teachers did not develop web based instructional materials for such reasons as the frequency of changes in curriculum, the ease of use of the existing/ready materials, and the perception of developing web based materials as a challenging task requiring expertise and team work. The study showed that the WBCD program could not meet its objectives, and the program was therefore found to be inadequate in encouraging teachers to integrate their instructions with technology. It was recommended that professional development programs like WBCD should be ongoing in all areas of the profession, rather than at particular periods of time.