Assigning The Screwtape Letters alongside The Great Divorce gives students two very different windows into the same concern: how small choices shape a person's spiritual direction. One book is told through letters from a senior devil coaching a junior tempter, while the other follows a dreamer on a bus ride to the edge of heaven. That contrast in form makes for strong essays, but it also makes them tricky to grade consistently.

Students often confuse narrative perspective with content, writing that both books discuss temptation without noticing that one presents it from the tempter's side and the other from the side of those who have yielded. A strong essay recognizes that Screwtape explains how a person is led away, while the ghosts show what it looks like when the leading is finished. Your rubric should reward students who see that distinction.

Comparison essays also demand structure, and many students lack the organizational tools to handle two texts at once. Deciding whether you will accept block organization or require point-by-point organization helps you grade consistently. Whichever you choose, tell students before they begin.

Grade the Point of Comparison

The quality of a comparison essay depends heavily on the point students choose to compare. Stronger choices include how each book depicts self-deception, how each treats the ordinary and unremarkable nature of evil, or how each uses humor to expose pride. Weaker choices, like "both books are about Christianity," are too broad to support a real argument.

• The thesis names a specific point of comparison and takes a position
• Evidence from both books appears in most body paragraphs
• The essay accounts for differences in narrative form and voice
• Analysis explains how each author reaches his effect
• The conclusion says something new about the pairing instead of repeating the thesis

Common Pitfalls Worth Flagging

One frequent pitfall is treating the two books as interchangeable, quoting a line from each and declaring them similar. Another is relying on plot summary of one book while analyzing the other, which leaves the comparison lopsided. Your feedback can name these patterns so students recognize them in their own drafts.

Students also sometimes confuse the voice of Screwtape with Lewis's own beliefs, since the devil's advice is deliberately inverted. A good essay notices that Screwtape's praise of ordinary comforts and vague spiritual feelings works as satire aimed at the reader. A rubric line about reading irony accurately can save you from marking the same misreading repeatedly.

Make Feedback Efficient Without Making It Generic

Because compare and contrast essays share common structural issues, you can prepare comment templates that address them, such as unbalanced evidence or missing transitions between texts. Personalize each one by referring to a specific paragraph or quote from the student's paper. This keeps the feedback meaningful while cutting the time spent writing it.

AI grading tools can identify which essays lean too heavily on one book and flag the paragraphs where the second text is missing. That gives you a quick map of where feedback is most needed. You can then focus your own reading on the analytical quality of the argument, which no automatic check can fully judge.

Use Results to Plan Your Next Unit

After grading, look at which criteria most students missed. If half the class had trouble accounting for narrative form, consider adding a mini-lesson on how genre shapes meaning before the next comparison assignment. The grading data tells you where instruction should go next.

Sharing a strong anonymous example with the class, along with a short explanation of why it succeeded, gives students a concrete model. Pair that with a checklist drawn from your rubric so they can self-assess before turning in their next draft. These small habits raise the floor for every writer in the room.