Woodcraft and Rockler both offer classes. They aren't in depth and may not be suitable for beginners.
Marc Adams (www.marcadams.com) has a school in Indiana that is well thought of.
John C. Campbell Folk School (www.folkschool.org) has a number of different classes and is more project oriented.
It depends on what you would like to do.
There are other places that offer a variety of classes in a variety of types.