Shelley,
I am a teacher, a parent of an ADHD son, an ADD dil, and I have some ADDish qualities which I discovered on my journey to understanding my son.
We opted out of the school testing because our school tests for ld's and not specifically for ADD. We refer them to their doctors for that. Our health plan Kaiser, does a questionaire that includes information from school, home and others.
There is not a single test that rules in or out ADD. There are ADD type behaviors that can be seen in multiple settings. There are some common descriptions of their school progress. Our son's was "he is so gifted but doesn't work to his potential".
Most of the tests, don't rule in ADD but rule in or out other factors that can crop up with attention and hyperactivity problems. Things like specific learning disabilities, aspergers, depression, and physical problems. For example, my vary non ADD son was recommended for educational testing and it uncovered an intermittent hearing loss. Having the ears treated changed everything.
What makes the testing complicated is that all of these conditions are on a continual scale with everyone. Some people are overly attentive (hyper focus) to hyper scanners(hard to focus). Supposedly normal is somewhere in the middle. Also what is normal in my home maybe different from yours and what is a good level of attention for home may not work in school. For example, the attention required of a student is focused. The attention required of a teacher is a scanner, keeping track of many things. So it is very confusing.
My journey with this in my son and myself, used many things, psychologists, coaching, medicine, behavior plan, and included working with his diet, exercise, sleep habits and develop routines to help his success. The most powerful change for us came from a psychologist coach, and developing routines for home, school, work anywhere that support his issues.
I recommend ADDitude magazine which celebrates and helps the type of personality that comes with ADD/H and I recommend the student control journal found on flylady.net. I have seen these things work wonders with families.
Good luck and celebrate your daughter as you go through this every ADD quality is a blessing in another setting!
Teachreef