Ehh, by the time they hit middle and especially high school and are rotating in and out of classes it is impossible to put together a comprehensive list of supplies that fits ahead of time because each class/teacher has their own things the kids will need as opposed to elementary where they have just one teacher and that one teacher can predict what they will need for the year on one list. It's not something that bothers me at all because, as you said, you just do basics and then when they get into the specific classes they can tell you what will be needed for the year.