Short answer
Many firms offer a one- or two-day supervisor course. Fewer build the skills over time, with practice on real work. When you compare providers, ask three questions. Is it spaced over weeks, or a single event? Do your own leaders take part in teaching it? And how will you know it worked? Kern and Partners trains newly promoted supervisors in our New to the Role program, spaced over months and measured before and after.
The longer answer
New supervisors face a hard switch. Yesterday they were one of the team. Today they are responsible for it, often for the same people. They need to give feedback to former peers, uphold standards and make decisions within clear authority.
Look for training that covers those moments directly and lets supervisors practice them. Ask for a sample of how the provider measures change. A satisfaction score at the end of the day isn’t a measure of change.