I taught a large class last summer, and one of my students asked me to write a letter of recommendation. I said yes, and at this point I think it is too late in the application process to change my mind.
The student got an A in the class, but never came to my office hours or talked to me at all before she asked me for a letter of recommendation. She also hasn't done anything specific to distinguish herself. At this point I'm really not sure what to write about her, although she did give me a "brag sheet" with information about her interests and previous projects.
How should I go about writing the letter?