Research on teacher development has been the focus of attention in recent decades. The overall aim of this study was to explore the impact of reading strategy training on high school teachers' reading instructional practices. The study was conducted in the EFL context of Iran. To meet this aim, four EFL high school teachers voluntarily took part in the study. Teachers' reading classes were observed and audio-recorded both before and after the teachers took part in a three-hour workshop on reading strategies. Drawing on data from observations, the results showed some degree of change in teachers' reading practices after their having taken part in the workshops. That is, they took a more strategic approach to the teaching of reading in their classes.