Where can you get an education for sitting on important boards? I'd like to sign up for that. All the article says is they have an education. It doesn't say in

Where can you get an education for sitting on important boards? I'd like to sign up for that. All the article says is they have an education. It doesn't say in which field - business administration, literature, engineering? I don't think all subjects are equal and the typical "education" certainly doesn't enable you to be an important board member.