For this assignment, one of the requirements is that you use outside research to support your argument. Your searches will be more effective and produce more credible resources if you are in the right store of information and shopping for the right things.
Some terms your professor shared with me are those that experts in the field have agreed on. You are not limited to these, but they will put you on a good track!
Once you've decided on the discipline-specific search terms you want to focus on, consider the argument you want to make about the topic of writing and add it to your search. For example:
("writing studies" OR "rhetoric and composition" OR "composition studies") AND ("artificial intelligence" OR AI)
Journal articles, books, magazines, and newspapers in almost every subject area.