I find the lists fascinating.
As you mentioned, parents purchasing materials for their own children would need to be selective.
I'd be curious to learn, from the perspective of students earning a "5" on the subsequent AP exam, which items on a list were utilized in their classrooms. For example, did a particular text book go unread? Were some materials and supplies unused? If students who earned a "5" could be queried as to which resources they recalled as being utilized and beneficial, possibly the lists could be whittled to their most meaningful items, for the budget conscious among us.
