His research and service duties revolve around school health policy and health and physical education pedagogy. At Brock University, Dr. Barrett teaches a number of elementary and secondary undergraduate courses that focus on physical and health education curriculum and instruction, as well as graduate courses focused on physical and health education policy and curricula using problem-based learning pedagogies. He has served as the Ontario representative on the Physical and Health Education (PHE) Canada Board of Directors (2013-2015) and as co-chair (2010-2012) and chair (2012-2013) of the PHE Canada Research Council. He served a two-year term as the co-chair (2017-2019) of the PHE Canada National Research Forum.