I recommend opening the reading on one side of the screen and the NotebookLM notes panel on the other. As students read, they can take notes using key quotes, record observations, and reflect on the text, learning by reading and annotating, not just by asking questions and receiving summaries.
A distinctive feature of this approach was the ability to turn individual sources on and off, limiting the notebook's search and chat to only the selected sources at any given time. This allowed for focused engagement with a single text before zooming out to compare across the full set of sources.
The "magic" of NotebookLM in this context was the ability to convert notes into sources. Once notes were converted, students could have a conversation with both the original articles and their accumulated thinking simultaneously, building a layered knowledge base that grew more useful the more they engaged with it. From there, a prompt like "based on what I found interesting from the notes, give me some suggestions of something else" could extend their reading outward into related territory.