Retention tests were conducted six weeks later after completing the PD program. The findings of these tests demonstrated that, the teachers’ increased level of integration with the technology as a consequence of the PD program was retained after six weeks. This result is consistent with the studies in the literature (Giordano, 2008; Lavonen et al., 2006), indicates that increment at the level of TI is sustainable. There might be several reasons associated with this. As stated earlier, most of the teachers were issued with computers installed at their classes (n=40), and computer labs with internet connection were available for all of them at their schools. These two factors may have been effective for sustaining the increment at the level of TI. Thereof, they may have tried to implement what they were instructed earlier. Numerous (n=35) of the teachers were more than five years experienced computer users, and all of them (n=56) were owner a computer at their households, and most of them had internet connection at their homes. The existences of these convenient skills and technology might have enormously facilitated to use the technologies in their daily lives and also to incorporate in their class settings for them, which they were accustomed via the PD.