Helen King Middle School is an expeditionary learning public middle school located in Portland, Maine and administered by the Portland Public Schools. The school's current principal is Kathleen Bouchard. It is cited as one of the most racially diverse in the state of Maine: the student body totals 550, represents 22 countries and 29 languages. The school teaches from sixth to eighth grade and has 55 teachers. The school operates without a bell system and emphasizes flexibility.