“…There is some evidence that unions have adapted to changing economic and political realities, seeking to shape reforms in order to remain relevant and powerful actors in K-12 education policy and practice (Young, 2011), but others note that the increased application of market forces to public education have eroded the unions' capacity to shield members from external forces (Murphy, Hallinger, & Heck, 2013). In the case of the state of Michigan, teacher evaluation was a specific provision barred from collective bargaining by the state legislature (Pogodzinski, Umpstead, & Witt, 2015). In a recent examination of teacher contracts over time in a single urban school district, Cowen and Fowles (2013) found that in spite of a number of state and federal education policy developments, there were very few changes in key contract provisions between 1979 and 2010, suggesting limited impact of such policies on salaries, transfers and assignments, evaluation, dismissal, and working conditions in Louisville schools.…”