As I understand it, Quantcast's monthly uniques is the totally number of different users to visit the site during that month. I assumed that daily uniques were

As I understand it, Quantcast's monthly uniques is the totally number of different users to visit the site during that month. I assumed that daily uniques were meaningless because of the nature of SchoolRack. Not every student logs in every day. It seemed reasonable to assume that a month is a reasonable amount of time for most students, teachers, and parents to login at least once. This tells you the actual number of people who actively use such a service.