Final answer:
Non-graded instruction is linked to progressivism, emphasizing individual-focused education rather than standardized grading systems.
Step-by-step explanation:
The practice of non-graded instruction, where students are not separated into grade levels by age, is a concept associated with progressivism. This educational philosophy emphasizes the importance of focusing on the individual child's learning process rather than a standardized curriculum or testing metrics. Non-graded instruction aligns with the ideals of progressivism by advocating for holistic education that adapts to individual differences among students.