Second Amendment as a teaching tool
That's the title of a paper by a number of law profs .... illustrated here. Many of the major battles of Con Law are long past, and so its modern controversies tend to be, well, rather trifling and often only barely based on constitutional issues.
That's hardly true of the right to arms. When an issue can get Akhil Amar's dander up, you know it's a hot one!