Good points, Stephanie.
I've done some freelance proofing/editing for newsletters before, but never for academic pieces. I am concerned about going too far (at what point does the editing stop and the rewriting begin?). I've done most of my business writing for architects, engineers, and interior designers, so I'm sure I'll be familiar with the content, but I don't want to get so carried away (which I tend to do when editing!) that I do a rewrite. For me, that's just getting into ethical issues.
As far as teaching them useful tools, I would hope so, but I've worked with people who never really looked at the stuff that I edited for them. Needless to say, they continued to make the same mistakes. I guess I'll have to figure out whether I should give them a red-pencil edition or a clean version (maybe both?).
Thanks, Stephanie.