My child just turned 5, has been going for less than a year and is sitting still longer, more focused, and reading and writing.
Kumon has helped both my kids learn to focus and get ahead in math. Its not meant as a remediation program for when kids are behind in a specific class or to help with school homework. Its designed as a separate individualized academic course to boost kids ahead in the long haul. Consistent practice and feedback is the only way to do this.
They make your smart kid smarter