Ma Moyenne MBN, developed by Vincent Sahler, is a browser extension designed to enhance the grade display on the Mon Bureau Numérique educational portal. The tool automatically calculates and displays a student’s general weighted average by processing the marks and coefficients found within the portal’s interface. It provides an ergonomic redesign of the Notes section, highlighting subject averages, and offering a simulation mode for hypothetical grade testing.

Subject simulation and data processing

The extension centralizes grade processing by computing averages directly within the browser without external data transmission. It integrates a simulation tool that allows users to input potential marks to see how they would affect a cumulative average. The interface includes a dark mode for better visibility in different lighting conditions and overlays information directly onto the existing dashboard.

Ma Moyenne MBN is open-source to allow for community verification of its code and calculation logic. No manual configuration is required after installation, as the extension is designed to recognize and process the portal’s data fields automatically.

Academic workflow and technical implementation

Ma Moyenne MBN streamlines the process of tracking academic results by removing the need for manual calculations outside of the portal. The simulation mode acts as a planning tool for students to assess their standing before the end of a term. Users must ensure that the coefficients visible on the portal are accurate, as the extension relies on this data for its weighted calculations. The extension operates locally on the user’s device to maintain privacy and does not function on standard mobile browser versions.

Practical utility for education portals

Ma Moyenne MBN addresses a specific functional absence in the Mon Bureau Numérique portal by delivering immediate weighted calculation and an improved visual layout. Its focus on local processing and open-source transparency provides a secure environment for students and parents to manage sensitive academic data. While it is a specialized tool restricted to the MBN ecosystem and desktop environments, it serves as a practical enhancement for users seeking deeper insight into their academic performance.