Your Booksource user account is tied into your school/district billing account in Booksource's internal system. This makes it easy for you to search and find your Booksource orders to import into your classroom library. You can look up the entire invoice/order history of your school/district and select the order you wish to import.
Note: All previous orders placed in that school/district will be viewable in the account history menu, including orders for the district that you have NOT placed. Do not be alarmed.