The Michigan Education Association is directing people to a website that insults and vilifies a 37-year member who authored a widely distributed letter explaining why she wants to leave the state’s largest teachers union. Lansing School District teacher Mary Davenport wrote a letter that was sent to thousands of teachers to alert them that if they want to quit the union it would only allow them to do so in the month of August. Many teachers have complained about this so-called August window. Since Davenport’s letter was distributed, the website MEAMatters.com has invited union members to respond online. The website...