What we learned in CS222, Spring 2026 edition

I worked my CS222 students through my usual semester reflection exercise today. I gave them five minutes to write down everything they learned this semester that was related to CS222, then we set a timer for 30 minutes while they offered items and I wrote them on the board. For some reason, we only had nine people in class today, but these nine came up with 88 items. I was going to give then six votes (because ceil(lg(88))=6), but a student in the front agreed with me that five was more symbolic, so they got five votes to mark the items most important to them.

The distribution of votes was unlike any I have seen before, and this may be because of the low attendance. Two items rose quickly to the top, with five and four votes respectively, but the next classification were with two votes, of which there were six. After a brief reflection, I decided to seize the opportunity and go ahead and mark all eight of these as "top items" for use in the final exam. These items, and their vote counts, are as follows:

• Clean Code (5)
• TDD (4)
• Version control (2)
• Using an API (2)
• SRP (2)
• Coding with a team (2)
• Red-Green-Refactor (2)
• Always run all the tests (2)

There is clearly some overlap among these, but that is fine. I look forward to seeing what the students have to say about these topics in the final exam.