DETROIT, MI - MAY 3: Stephanie Griffin of Southfield, Michigan, a teacher at Detroit's Cass Tech High School, participates in a Detroit teachers sick-out, the second in the past two days, and protests in front of Detroit Public Schools headquarters,   May 3, 2016 in Detroit, Michigan. The sick-out forced the closing of 94 of 97 Detroit school districts today. The teachers are looking for a guarantee that they will be paid for the work they perform.  (Photo by Bill Pugliano/Getty Images)