“…The interpretive value of mastery is likely dependent on the goals of the test (e.g., readiness to progress to another subskill vs. readiness for higher‐order application) as well as the specific criterion for mastery. Although 80% mastery is often seen as an acceptable indicator of mastery in math (Butler et al., ; Zimmerman & Dibenedetto, ), other research has used values as high as 100% (Burns et al., ), and reading research suggests a negative impact on higher‐order skills when accuracy falls below 95% (Burns et al., ; Jenkins, Fuchs, van den Broek, Espin, & Deno, ). Thus, research is needed to evaluate whether substantive differences exist in student understanding contingent on the way in which mastery is defined.…”