Complex sentence: At this time Hartley was also teaching and lecturing on both drama theory and practice, her work focused on therapy through drama working extensively with theories and methodology related to Augusto Boal's Theatre of the Oppressed.
Split into simpler sentences: At this time, Hartley was also teaching and lecturing on both drama theory and practice. Her work focused on therapy through theatre, working extensively with theories and methodology related to Augusto Boal's Theatre of the Oppressed.