i hated doing kumon as a kid. i hated it more than piano practice and lessons, more than yard work, more than chores. but as much as i hated it, our kid(s) will certainly be doing it. how do i know this? because the math capabilities of some people i know are just sad:

examples from this week alone
person1: what's 5% of 1 million?
me: you serious? i'm not going to even answer that.
person1: ummm.... 5 thousand?

person2: what's 1/2 times 3/4? i mean, i know what it is in decimals [she had her calculator open] but what is it in fractions?
me: .... you serious? my kids are doing kumon.