I have a friend who has both of her sons in Kumon. One son is in learning assistance at school but has never been tested for a learning issue. She feels he is just behind (since hes a boy who like sports more)and would never fathom the idea that it may be something more.Even though I have dyslexic daughters I don't push the issue as I said she is in denial and would never consider it. Anyways, both her boys grade 3 and 1 are in Kumon. The system is all worksheets. Nothing but worksheets and more worksheets. They go to the class to sit and do worksheets for an hour. She is expected at home to do more worksheets. For the grade 1 boy he is benefiting and reading quite well. The boy in grade 3 is struggling still. I get the feeling that for children with actual learning differences Kumon will not help much but for a child who is looking for a learning boost it may be beneficial.
For a 6 year old boy I would recommend www.starfall.com for reading help. Its free too!

He's having a hard time reading. He can sound out each letter but can't seem to put the word together or is too slow in doing it. Often times he can't recognize the word in a different context. For instance he can see the word funny in one book and not recognize it in another. Or sometimes he see the word home and read it as house. If someone reads him something he's able to relate the story and discuss it. Every thing else he's pretty good at except reading. My husband and I have sat with him several times to discuss reading and we can notice his frustration. I think that maybe professional help will benefit.

Hi. The answer depends on why you feel your child needs tutoring, and what you hope to gain from it. I've heard of cases where parents want to be sure a bright student is better prepared to take tests that might qualify them to get into a school's gifted/talented program.
I've also heard of cases where families moved, and perhaps students in the new school are covering different material than kids in the old school did, (ie, a child's new school has kids doing division problems, but the old school was just working on addition and subtraction and single digit multiplication. Your child might benefit from having someone help "fill in the missing information" to get them up to speed.) That's in contrast to children who might have learning disabilities, and have already been exposed to material, but just don't seem to be able to "get it." Few of the "chain" tutoring places like Kumon, Sylvan, or Huntington, etc. have teachers who are trained to use multisensory methodology that kids with LDs usually need.
Why do you feel your son needs assistance?