Initially, when teaching in IEPs, I used Extensive Reading with intermediate students.  These students were already accustomed to reading some in English, although they usually only did so for class purposes.  Day (2011) has found several benefits of using Extensive Reading--it can improve reading comprehension, help students employer greater use of reading strategies, increase reading speed, and increase writing proficiency and vocabulary.  Plus, because students often enjoy it, they become more excited about reading in general.