I use this extended writing DBQ activity with my 7th graders, during our Middle Ages unit. It is designed to have them practice choosing/analyzing appropriate evidence, more than writing a claim, so I provide the claim for them. (This was especially helpful for students who struggle writing claims, and then never get to the evidence part!)
The document that they analyze is an excerpt from a speech delivered by Pope Urban II.
It includes directions, the document, and many scaffolds like a TEXXT graphic organizer for planning purposes, sentence starters for each section that align with TEXXT, etc.
In addition, there is a claim/counterclaim extension exercise for higher-level students, as well as an Exit Ticket that encourages students to self-assess which parts of the writing process are most easy/difficult for them.
I grade them using my school's Social Studies writing rubric but really, any evidence-based writing rubric would work.