In higher levels (G and above), many Kumon centers actually allow students to use the answer book after completing the worksheet for self-correction. This is a legitimate learning tool. The key difference is timing —checking after you finish versus copying during the attempt.
Level G is designed to bridge the gap between primary school math and high school algebra. The curriculum focuses heavily on: kumon g level answer book
I can prepare a general informational report about: In higher levels (G and above), many Kumon