My students are only functionally literate. As in - they can read, almost. In terms of grammar I will generally try to correct things if I see them, but it happens so much I have almost grown numb to it myself. There's a new site I saw advertised a few days ago that I've been pointing my students to - GRAMMARLY.COM - it supposedly finds and corrects grammar mistakes much better than MS Word. We'll see if it makes a difference on the next written assignment, but that's my solution for now.
Good Luck!
