M.L.
Hi S., we are going through all of this with our 14.5 year old son. He was just diagnosed with ADD (not ADHD because he's not hyper, just has some focus issues). He was missed in school and by us for all of these years because he's extremely smart, he always tests way above his grade level and impresses all of his teachers. But, he wasn't doing his homework and in most cases would take hours to do what he should do in 30 minutes or so.
So, we have Kaiser (Oakland) and their psychology department ran a battery of tests on him: a computer focus test, scantron, and then we, his teachers and our son filled out behavioral questionnaires on him. They crunched all of the numbers and came back that he did have ADD (more specifically Executive Functioning disorder). Makes sense to us now that we look at all of the symptoms and compare them to our son's behavior.
If you don't have Kaiser, there are Educational Psychologists that do this work. In fact we are now working with one. Kaiser's frontline treatment is drugs and we don't want to drug our son, we want to give him the tools he needs to become unstuck when he's stuck and to move him forward. So, we're paying (a lot!) for an educational psychologist. So far we like her but we've just started. We're in Oakland, but if you need a referral message me and I can pass that info on.
We too thought our son was being lazy, but now we feel quite bad that we didn't notice this learning disability before! So it's not a bad idea to have your daughter screened at least. Hope this helps.
M.