You mention 'effective' and 'expert' teachers in your writings. I am assuming they are the same thing?

Yes, in our National Boards for Professional Teaching Standards (NBPTS) study (Smith, W. T., Baker, W. K., Hattie, J., & Bond, L., 2004) we mainly used expert to distinguish from experienced but not expert (I can send you this article, book chapter, if you do not have it” (John Hattie, personal communication, March 13, 2018).