She also covers symptoms, ways to get help at school and a lot of very useful things including discipline. I think the book will also help you figure out if his symptoms
are similar enough to ADHD
to seek a professional diagnosis. I can also recommend web sites for that, but I like all the other stuff she recommends, which is why on the ADHD forum, I recommend this book a lot.
By the way, with kids of his age - discipline should still be very immediate, consistent and short.