In response to the need to train teachers to effectively integrate technology into elementary and secondary education, a teacher professional development program funded by a federal grant provided a selection of instructional technology integration courses to K-12 teachers. This study investigated the impact of these courses on the course participants' self-efficacy in learning about and implementing instructional technology. The study also explored the differential effects of these courses on participants' self-efficacy due to different demographic characteristics. The positive perceptions of the course effectiveness from the participants suggested an overall success of the program.