A good example of an argument essay that’s relevant to school settings is Paul Barrette’s 2013 blog post “Schools are NOT coffee shops.”
Barrette, who tweets as @head_geek, uses comparison to develop his argument. He writes in first person, using personal experience to illustrate his points.
The kind of argument Barrette provides is the sort students need to be able to read by high school graduation and write by their sophomore year of college.
You could use Barrette’s piece for teaching reading comprehension, vocabulary, thesis statement, outlining/planning, fluency, etc. You could also assign argument essays in which students show why some comparison commonly used in English class or in a school setting doesn’t hold up to scrutiny.