AUGUSTA — Maine’s first two charter schools have received passing grades from the state.

Reports from the Maine Charter School Commission said the Cornville Regional Charter School and the Maine Academy of Natural Sciences in Fairfield both lived up to their mission statements during the first year they were in operation. The commission did add that there was room for improvement from both schools.

The schools opened in the fall of 2012, one year after a state law was approved allowing up to 10 charter schools through 2022.

Three additional charter schools opened in September.

Charter schools are public schools that operate independently of local school districts, offering alternative choices for students. They are run by private groups that agree to meet certain standards in exchange for less regulation.