After you read the short story, you might want your students to read this script. Students love reading scripts as it is very student-centered and gets them involved. I think they retain more when they are part of this kind of a reading.
This script is arranged into eight parts, four characters and four narrators, so if you have, let's say, a class of 24, you could have three groups reading it aloud simultaneously, two in the class and one in the hallway. The script itself will take less than a full period, so you can use one of the following activities, such as the study questions or the vocabulary activity that I put together, and have it go over into two days.
"Charles" is a great story for exploring the concept of "ownership" vs. "projection" or having blind spots and seeing flaws elsewhere, rather than 'fessing up oneself.
Reading scripts helps make our classes more student-centered. It engages students on a peer-to-peer basis, improves subsequent class discussions, while it gives you feedback on their reading and acting / dramatization skill levels. If you like having your students read scripts of the stories they read in the usual way, then look around my "shop" further and follow me at TPT. -- Thanks, John C.