Further reading
Writing Arguments: A Rhetoric with Readings by John D. Ramage, John C. Bean, & June Johnson
Much of the content in this lesson is based on this textbook. Highly recommended.
Teaching Argument Writing, Grades 6-12 by George Hillocks Jr
Another great book, but more modest in scope.
Unlike Ramage et al., Hillocks writes for middle and senior school teachers. We incorporated some of his thinking re sequencing and framing.
The Uses of Argument by Stephen Toulmin
This is more a name-check than a straight recommendation. Toulmin is an analytic philosopher whose argumentation model underpins both Ramage et al. and Hillocks' books.
Worth reading if you want to go deeper on the epistemological aspect of arguments. (And there's an argument that we should all go deep on epistemology.)