Well, what you don't know really won't hurt you or your wonderful daughter (I don't know what "dd" is), at this time. I identified a lot with what you described was happening to her, as I was an "underachiever" in elementary school. Then my 4th grade teacher asked to conference with my mother and me, because I didn't grasp fractions in grade 4. Stubbornly I insisted on figuring them out, my way, adding the 1 in 1/4 to sums. The teacher said a little doubtfully to my mother, "She seems bright......."
A rebel in high school, I failed 12th grade and didn't do well, and barely passed it the second year I took it over. In those days, in Canada, you didn't fail just one subject; if you did, you had to do all the other subjects over again......
The summer after finally graduating high school, I took a job at an insurance company and hated it! When I got a letter saying I hadn't been accepted into the nursing school I'd chosen, I was distraught. So I got into a it "on trial" in 1957, because the Rabbi at our temple wrote a glowing letter about my uncle, the philanthropist - not a word about my attributes (not great).
So, when Nursing School began I started to pull the same stuff I did in high school. Given an assignment to read, I didn't do it. It was kind of a reflex thing, getting negative attention. (But I didn't know about that) The older, imposing/frightening Director of Education taught us A&P, and Pharmacology and knew her students' foibles well. When I had no answer to her questions about the assigned reading, she threatened to have me in her office memorizing the chapter she assigned next. Ever willing to challenge my teachers, I didn't read it, and had to spend Lunch in her office with her scowling face, and pointed witch-like cap, in front of me. She asked me what I'd learned and I repeated the chapter verbatum.
"See", she said, "You are intelligent". No one had ever said that to me before! To make a long story somewhat shorter, I went on to ace every class and got the highest score on the licensing exam than anyone else in Canada! We didn't call it NCLEX then. So I went on to get my degree, not with the same success, as I had returned home to Toronto for it, and living there wasn't good for me. However I was proud of my achievement, and certainly enjoyed the jobs/positions I was able to get with that.
So even though a psychologist/psychiatrist might have found a diagnosis for what ailed me, (? educationally challenged ?) and if there had been medication for whatever it was, I would have gotten it. I did see a psychologist for many years while my marriage was failing, and after it was dissolved.......then others when I coudn't get my life together, and finally when I was in my early 50s, my PC physician asked me as I sobbed in her office, unable to describe the symptoms of something physical I had, if I'd like to try an antidepressant. It worked!
I'd had crying episodes often during my teens and they intensified with crises later. My maternal grandfather had committed suicide, my mother made numerous attempts to do that, and I'd had one attempt during my marriage. It had never occurred to me that I might have inherited depression (nor, at the time, had anyone else discovered/researched it).
Almost 20 years later, I'm still on that wonderful pill, spoiled only by its high cost (Medicare D would cost me more in premiums than all the medications I need, cost). However there's some way to get them covered by challenging Medicare, so I'll do that.
The reason I've shared my story, is that there may be untreatable reasons for kids not learning. No one would have thought I was depressed, as a child, but I sure was angry! There may be new anti-depressants coming out that won't do harm to children and teenagers....... and eventually the stigma people with mental disease suffer, may reach acceptance in others.