It isn't uncommon to change a course schedule to adapt to student needs. But sometimes it leads to surprising results.
Students began by completing a "pre-search" worksheet asking for basic information about their proposed topic for the research paper, some contextual information, keywords that could be used in a search, and the call number and title of a possible source. All the students had to do for that Wednesday was find me on the library's first floor, show me the completed worksheet, find the book, and then show me the book.
Somehow I expected I would have a lot of time to myself, that they would find the book and be done with it, and that the day was really about them having more time to gather research. It turned out differently. I only had brief periods to myself. Some students needed help understanding the overall paper assignment. Some didn't have their worksheet completed. Others were prepared but needed help understanding call numbers, figuring out where the books were shelved, or locating the circulation desk.
Simple as it was, the day was very useful and revealed areas where students had misunderstandings. In retrospect, I realize that this was a flipped class. Walking through the library and finding books are usually out-of-class tasks. Having them complete the activity during class time ensured, first, that they did it and, second, provided them with valuable guidance.