SDE (Secretary of the Ecole) is a mobile application that provides special features for basic cycle operators in Mauritania before replacing the manuelle device on the paper with a simple and effective numerical solution. It allows you to easily facilitate your learning, classes, books and notes, and automatically generate bullet points that conform to your Mauritanian educational system — all of your phone's devices, without constant internet connections. The application will monitor the administrative charge of the employees, remove the calculus errors, secure the educational donation and update the school account in a context or the resources that are limited.