One of the ways I've found to help my students with English, is to give them a three part script to read. I write these scripts with my student's needs and language skills in mind. Since the monks wanted to learn American idioms, I try to include them as well in the scripts. In the short clip of a video below, three friends talk about university life.
Students take turns reading each of the three parts of the script. Not only does reading from a script help the students work on their pronunciation, but it also helps them with fluency.
Prior to having the monks practice in groups of three, I read this script to the whole class several times. Next step after this group practice, will be to have the groups read the script to the whole class.