Find 2–3 other students in your center who are also on Level O. Each of you tries the same 5 problems. Compare answers. If three of you get the same answer, it is likely correct. If one person is different, you have a debate that leads to learning.
If you are using (or considering) the Kumon Level O Solution Book: kumon+math+level+o+solution+book
Problem: Compute $ \int x e^x^2 dx $.
Solution: Find 2–3 other students in your center who