This is a great interview about leadership styles, problems and solutions. It is well worth a listen and could be used in the leadership part of MALT and other programs.
This is a library of video talks that have been given at Claremont Graduate University. There many that could used as materials in action research as well as other classes. There are number that focus on what is credible evidence. And there are resources that address many of the action research problems that students select.