The phrase "to pass the grade" means to achieve a satisfactory level of performance or proficiency in order to move on to the next level, course or standard. It refers to meeting the required standards set by an educational institution, examining body or other authority for passing a particular grade or level. For example, if someone is taking a math class and needs to get at least 70% on their final exam in order to pass the grade and move up to the next level, it means they must score above 70% on their test to "pass the grade" and advance to the next course or level.