This unit is a version of what I've been teaching in my 8th grade class for a while. I made this unit with a younger student in mind, students who haven't had a lot of experience in argumentative writing.
I've broken down the writing process into 10 steps, and each step has student handouts and instructions:
Step 1: Think of topics. (organizer and instructions)
Step 2: Choose a topic. (organizer and instructions)
Step 3: Educate yourself—research and research notes. (student handout with to aid discussion on researching and credible sources, 3 research notes organizers)
Step 4: Write your claim. (student handout for information, student worksheet )
Step 5: Determine your reasons. (student worksheet to document reasons)
Step 6: Outline your paper. (outline organizer)
Step 7: Write a draft. (student information paper with tips and guidelines)
Step 8: Revise. (ARMS revision paper)
Step 9: Edit. (CUPS editing paper)
Step 10: Write your final. (student handout with tips and reflection questions and scoring guide)
This unit doesn't include the counter-argument, other than to define it as a way to test the validity of the claim.
I think you'll find this to be a great addition to your argument lessons!