Five groups have submitted proposals to open new charter schools in Maine in the fall of 2013. The Maine Charter School Commission received applications Wednesday from Harpswell Coastal Academy in Harpswell, Heartwood Charter School in Kennebunk, and Queen City Academy Charter School in Bangor, as well as from two virtual schools called Maine Connections Academy and Maine Virtual Academy. The state’s first two charter schools opened in October in Fairfield and Cornville. Two other charter schools, in Portland and Gray, have received conditional approval to open next fall. Under Maine law, the charter school commission can authorize up to 10 public charter schools statewide over the coming decade. Charter schools are funded with state dollars but operate independently of local school boards, offering an alternative school choice for students.