So I have struggled with this thing. What happens is when I'm learning something I hear that what they say is English but I can't process anything the teacher says. Same thing for reading or instructions lectures teaching and so on. It's a big problem with my ability in school. I had this term of math where randomly I was able to hear what the teacher was saying. I instantly would understand all the concepts and would always be the first to finish and would do things always near perfect. So when I can comprehend things I actually do really well. What is this and is there anything I can do about it?

I've been dxed with inattentive ADHD if that helps.