# How It Works

1. **Register Students**: Press `r`, enter ID and name, show face to camera
2. **Train Model**: Press `t` to train the CNN on MNIST (first run only)
3. **Start Quiz**: Press `q`, system picks a random number (0-9)
4. **Draw Answer**: Press `c` to open drawing pad, draw the number
5. **Submit**: Press Enter to recognize the drawing
6. **Profile Updated**: Answer linked to detected face, grade calculated