Supervised Polygons was a final project for the “Democratizing AI through K12 AI Education Class” of Spring 2019. This project was developed by Ayesha Bajwa, Sanjana Srivastava, and Kevin Robinson. Supervised Polygons helps students think critically about fairness in AI models by identifying ways that bias can manifest in algorithm-based decisions and exploring how this bias may impact users. This is an activity for middle school students.