This idea has been developed and deployed to Canvas  Please add a "Solutions" option on quiz questions.  We can add comments to essay questions in Canvas for students but there is no place to...

That would be a good idea.  My idea is simply to include a comment box where course designers could include answers/explanations for instructors/tutors to reference when grading an assignment. 

I think we are wanting the same thing.  See my suggestion:  https://community.canvaslms.com/ideas/3377

I agree Jessica!

Agreed.  Please help us get more votes.  We had this feature in eCollege and it was extremely helpful for instructors teaching a section of the same course.

I agree Jessica!

That would be a good idea.  My idea is simply to include a comment box where course designers could include answers/explanations for instructors/tutors to reference when grading an assignment. 

I think we are wanting the same thing.  See my suggestion:  https://community.canvaslms.com/ideas/3377

Agreed.  Please help us get more votes.  We had this feature in eCollege and it was extremely helpful for instructors teaching a section of the same course.

Really wish we could get more votes on this.  Which LTI are you using?