DP2 students Kevin and Dylan, together with DP1 student Tudor, developed GradeBac after becoming frustrated with how difficult it was to calculate and predict their IB grades. ManageBac only provides grades as percentages, while different assessment types — such as quizzes, tests, and projects — are weighted differently.  

Determined to solve this problem, the students spent weeks perfecting the formula down to two decimal points before coding the browser extension. They went through over 20 versions, refining the interface and fixing bugs to ensure a smooth and accurate user experience.  

Their biggest challenge came when trying to get the app approved on the Google Chrome Web Store. “We were rejected countless times because of policy guidelines,” shares Kevin. “But we kept improving and resubmitting, refusing to give up.”  

For the team, GradeBac isn’t about profit. “We wanted to make something accessible,” says Tudor. “Every IB student deserves an accurate, simple way to understand their progress — it shouldn’t be a struggle.”  

The extension is designed to work with any school’s ManageBac system, not just QAIS’s, reflecting the students’ vision of making it available to the global IB community. They are now continuing to refine the code and formula to include grade prediction features in future updates.  

Now officially live and free to download, GradeBac is available to students worldwide via the Google Chrome Web Store.  

https://chromewebstore.google.com/detail/gradebac-managebac-grade/abojieelcphbbhebcibbekangkmdbhnd?pli=1