This scaffolded breakdown of the three classic "keys" to persuasion demonstrates the surprising objectivity of persuasive writing. It is, in fact, a skill that can be learned and developed.
Based on my own teaching experience, and that of my teaching team, I have divided the techniques into Level 1 (Easy), Level 2 (Medium), and Level 3 (Hard) groupings. Levels are designed to build on one another. So, in theory, once a student has mastered "Level 1" he/she should be able to move on to Level 2, and eventually 3, maturing his/her own persuasive voice in the process.
**Scope & Sequence Note: I recommend this product as an introduction (or secondary-level refresher) to persuasion via the three classic rhetorical appeals.