I work with high school students with disabilities. (No, that is not my special ability) One of the things I tell them, especially when they are frustrated trying to improve on an academic subject that is linked to their disability, is that not everyone is good at everything. I think young adults with disabilities think everyone is smarter than they are, or can do just about everything out there, and it makes them so discouraged. I tell them everyone has difficulties with something, and is really good at other things. They don't believe me. So I tell them about me!
Sure, I say, I'm good at the academics, for the most part. But don't ask for an answer in history class. I suck at history! (and if this is being done in a group setting, hopefully there's a student there who has had me as an aide in history and knows I don't remember the fine details and have to look things up just like they do, and will tell the other student, with examples

) I can do the math, I tell them, and bio and chem, English, but I'm rusty with the foreign languages and history is my downfall. I also tell them I can't cook worth beans. That once I made oatmeal cookies and forgot to add the oatmeal. That usually is enough to convince them no one is perfect!
The one thing I'm really good at - teaching kids how to do math, bio, chemistry. Breaking things down into logical steps, modifying curriculum so that a student can learn what needs to be learned, and not feel stupid, or left out, or less than.