In 2012, teachers in the Roscommon area school district became the first in decades to "decertify" the Michigan Education Association — fire it — and start their own independent union. Now, three years later, the president of the startup local, called the Roscommon Teachers Association, said 64 of 65 eligible teachers have voluntarily paid dues as of the recently completed school year. It probably didn't hurt that the union's $500 dues are about half the amount charged by the MEA, the state's largest teachers union. “Roscommon teachers show that voluntary unionism can thrive if the union is proving its worth...