Pediatricianonline -ADHD

My child was born about 38 weeks gestation age, but weighed 5Ibs. 11in. at birth.
====== i dont feel thats any major worry .

He was diagnosed with ADHD at about age 5 years.
======= well, ADHD is a spectrum of disorders and your child may have only a mild element.

He takes Concerta (27mg) to help him focus at school.
====== it will help him, but donot change doses /duration without medical advice. It may be for years.

He is now 8 years in 3rd. grade,
====== no bad for ADHD!

]and I am wondering if he will ever grow out of this disorder.
===== somewhat satisfactory depending on counsellings.

Could his relatively low-birth weight be a factor to this disorder?
====== no!

I have also observed him with poor social skills amongst his other siblings and friends.
======= yes thats what counsellings may try to help for.

Are there other treatment plans out there for kids like my son?
======== there are a few like atomoxetine, that your specialist may decide as it may have its side effects.

Even counselling is not effective in my opinion.
======= surely, only counselling will never help significantly.behavioural/play therapies do have some role.