Not the person you replied to, but I definitely had emotional outbursts but was the top student in my class. I was diagnosed as ADHD in graduate school, at the age of 23. Meds were life-changing for me - I not only had classic ADHD, so I had study patterns to unlearn (studying with music + TV + snacks + distractions) but I also had Rejection Sensitive Dysphoria - basically, I would hyper-focus on any perceived critical comment, rejection, slight, etc. I would contemplate whether I could ever show up in class again after a side comment from a teacher. It took so long to unlearn that (and some antianxiety meds as well). If your kid actually has ADHD, the best thing you can do for them is have them work with a therapist to learn coping skills and the proper way to do things. Meds may enter the picture eventually, but a therapist that works with ADHD and autistic people primarily will be the most helpful. Little things - fidget toys that help you pay attention to auditory stimuli, weighted lap blankets to work at your desk, etc. help so much sometimes, and they're relatively simple fixes, but if you don't know to look for the issue, you don't find a solution.