If you click on reports, then the assignment, it will show you all the questions that were correct and those that were incorrect, for each student.

Yes I get that, but if you read the question I have, it is not just about the ones he missed.  It is about knowing the actual answers he gave that were wrong so that I can do some analysis on what pieces of the process need training. "This is critical in order to help the student fix the core misunderstanding as opposed to just re-feeding him all the videos on the topic."

Is this a new difficulty that started with Khan Academy Reimagined?
I've started a post to try to get teacher feedback on Khan Academy Reimagined; if you have been using Khan Academy in your classroom both before and after the change, would you be willing to post your feedback?

(I'm just another user, and I don't know if KA will use the feedback, but I think it's worth trying.
I don't remember seeing a single comment in the Support Community that says a teacher likes anything about the change. I've seen several saying they dislike aspects of it, and several saying they really want the old interface back.
I don't even know if KA had any classroom teachers test KA Reimagined; maybe KA staff just guessed what teachers wanted based on Support Community posts.

If far more classroom teachers dislike the changes than like them, KA should roll them back.)

~ Janice, KA user