This mixed-methods study synthesizes Standards-Based Grading (SBG) literature, analyzes 249 Arkansas administrators' survey responses using OLS regressions, and identifies themes through in-vivo coding of qualitative feedback. Results show more SBG support among liberal, elementary-level administrators in larger, economically diverse districts. Qualitative insights highlight structural barriers and mindsets against SBG, emphasizing its importance for mastery-focused assessment and grading alignment. These findings underscore the influence of principals' beliefs on SBG support and suggest researching the contextual and ideological factors influencing SBG's implementation.