So, thanks for all the help with the idioms! Today I taught "to go overboard" and "over my dead body," both suggestions from my mom (thanks!). Great ideas! Some of my ESL students have been in the U.S. longer than others; those are usually the ones who recognize the idioms the quickest, and they recognized these right away. So I know I hit on some common ones--always the best technique because of the varied language ability of all of the students.