It would be a similar process to organizing a club, though the exact steps would differ between schools. Ideally you’d meet up at a common central location for everyone and then continue onward to school, picking up other students along the way at other checkpoints.
No that’s not the point. In countries like the Netherlands where proper bike infrastructure is in place, cyclists physically separated from car traffic. This type of “freak accident” would not happen if that were the case here.