First grade students Elizabeth Baker, Neallie Morey, and Neallie’s sister Carly, a fifth-grader, were among RSU 14 students in Windham to board a school bus Tuesday for the first day back to school. John Patriquin/Staff Photographer

First grade students Elizabeth Baker, Neallie Morey, and Neallie’s sister Carly, a fifth-grader, were among RSU 14 students in Windham to board a school bus Tuesday for the first day back to school. John Patriquin/Staff Photographer

First grade student Elizabeth Baker is all smiles as she joins other RSU 14 students in Windham on the bus for the first day of school. John Patriquin/Staff Photographer

First grade student Elizabeth Baker is all smiles as she joins other RSU 14 students in Windham on the bus for the first day of school. John Patriquin/Staff Photographer

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Students in the Poland, Scarborough and Bonny Eagle school districts begin classes Wednesday. Portland schools begin classes for all grades Sept. 2.