LARGO — The Pinellas School Board on Tuesday approved several changes to the district's top administrative team. Bill Lawrence, associate superintendent of teaching and learning, was demoted. He has been appointed director of student demographics, assignment and school capacity. Pamela Moore, executive director of pre K-12 core curriculum, will move into Lawrence's role as associate superintendent. Seymour Brown III, principal of Plumb Elementary, has been named director of human resources. Superintendent Mike Grego recommended the changes.