While reading Blood on the River by Elisa Carbone, we use multiple non-fictional accounts. The article entitled "The Pocahontas Myth" was written attacking the Disney version of events concerning Pocahontas. The opinion piece is great for finding evidence to support author claims.
This file is an extended-response question that relates to the article and is then proceeded by answers on four different levels. In my classroom we use the ACE method as developed by Lovin' Lit. See her freebie to use this in your own classroom. I give students the question in this file and then copies of the answers. Working cooperatively, they sort the answers into four categories and then develop a rubric to support their sequencing.
We then use this rubric as our class grading system for future extended-response questions. I usually have the students immediately follow this with an extended-response question either about the article or the novel we are reading and they write 4 answers - each at a different level.
This seems to really help them grasp what it takes to write at the highest level.