I work at a pediatric therapy clinic. Great success has been made with our kiddos without the use of drugs. Have your child evaluated by an Occupational Therapist. Insurance will cover and they can determine severity and either continue with treatment or give you a home program if necessary.
Sorry, this is me again. Our daughter was diagnosed with dyslexia in grade 1. It is never to early in my opinion..... The earlier you know the more you can do. Our daughter had always extra help from grade 1 all the way up to grade 9. Work with the teachers, ask what you can do at home, it is different for every child. They did teach her how to handle and how to learn with her disability.....She could do high school without problems....she is doing fine now and is in cooking school she wants to become a chef cook :) Sorry I have no experience with adhd.
By that age, ADD/ADHD are definitely diagnosable. While I also agree that meds are not the cure-all (as with any disease, meds can be helpful, but should not be the only answer...wish doctors would realize this!), I would be open to using them and see if they are effective. If they are, great, if not, move on to another treatment option. And btw, as someone who works in the foster care system, major kudos to you for adopting and helping take children out of the system:)