AUGUSTA — Maine’s Department of Education is inviting the public to weigh in one last time on its plan for holding schools accountable and helping them improve.

The public comments will be considered for the department’s formal request for flexibility to the U.S. Department of Education. That will be filed by Sept. 6.

Since fall 2011, the department has surveyed more than 1,500 people, held several public forums, opened a website and held working groups with stakeholders’ participation.

The final forums are scheduled for Monday online, Tuesday at Westbrook Middle School, and Thursday at Brewer Community School.