Approaches to Professional Development

What is the name of the scientist who identified the main approaches?

In what year were the approaches identified?

How many basic approaches are there?

What is the name of the approach in which teachers learn from experts by reading their theories

or listen to their speeches at major conferences or online webinars and then apply what they have learned in their training.

In which approach are less experienced teachers (or those with less experience).

experience in a particular skill or activity.

Learning as critical or another name?