All school bus drivers will spend plenty of time in training sessions throughout their career, with much of it mandated by local or state laws. However, sometimes you may have one or more drivers who need more intensive retraining to get them back on track. This can be a tricky proposition because retraining carries a stigma, and can easily be seen as punitive or threatening.
In other situations, that might not be so much of a problem - but with the school bus driver shortage still a major issue, you really need to retain the drivers you have! As such, it's important to conduct your retraining sessions in ways that maximize their potential to improve driver performance, without causing any new problems.