The implementation of a standards based grading (SBG) system has proven to be difficult even in school districts that tend to be progressive in their educational approaches. Parents are often resistant to the change in grading systems and seem to be a significant barrier to a school's move to SBG. Researchers in this qualitative study went directly to the parents who most vocally and vehemently opposed the new assessment system and sought to understand their perceptions. Data from these interviews produced five themes: Confidence in the known, dislike for the unknown; poor communication leading to disappointment; confusion from lack of clarity; and frustration due to perceived outcomes. Data from this study indicate that school leaders ought to consider reframing grading reform and better align it with Dweck's growth-mindset model and create a process that is less about enticing students with the currency of grades and more about helping students' learning dispositions that would enable success in college and career. Further, in addition to vigilant communication, school leaders need to plan high quality professional development to clarify and refine the purpose of grading and align practices with that purpose.