Me. Rev. Stat. tit. 20-A, § 13603

Teachers who are members of the National Guard or the Reserves of the United States Armed Forces are entitled to take a military leave of absence from their respective duties, without loss of pay or time when engaged in military training not to exceed 17 calendar days in any calendar year, provided that the teachers have made a reasonable effort to perform their military training during the period when school is not in session.