With this application, at the beginning of the school year, you will have to stick a QrCode on each book, notebook or workbook (available on the following link: http://clg-le-colombier-dun-sur-auron.tice.ac- orleans-tours.fr/dotclear/public/QRcodes_SAKADO.pdf).Then you will have to save by scanning all the books, notebooks or workbooks of a day (see tutorial on the following link: http://clg-le-colombier-dun-sur-auron.tice.ac-orleans-tours.fr /dotclear/public/Tutorial__SAKADO.pdf).Then during the year, when you prepare your bag, you scan all the QRcodes of the books, notebooks or binders that you store there and the application will indicate "ERROR DE MATERIEL" so as not to overload the bag. And the app will show "BAG FULL" when everything is scanned.Thus, the objective is to make young college students more independent, while reassuring them and avoiding overloaded bags.