Mass. Gen. Laws ch. 71, § 44: Restrictions on teachers' political rights; prohibition

Section 44. No committee shall by rule, regulation, or otherwise, restrict any teacher in, or dismiss him for, exercising his right of suffrage, signing nomination papers, petitioning the general court or appearing before its committees, to the extent that such rights, except voting, are not exercised on the school premises during school hours, or when their exercise would actually interfere with the performance of school duties.