Having a learning disability (缺陷,障碍) doesn't mean you can't learn, but you'll need some help and you'll need to work very hard. If you have a learning disability, remember that you are not slow.
Learning disabilities can be genetic. That means they can be passed down in families through your parents, even your grandparents.
"Dyslexia" is a learning disability that means a kid has a lot of trouble reading and writing. Kids who have trouble with math may have "dyscalculia". Other kids may have "language disorders", which means they have problems understanding language and understanding what they read.
How do we tell if a student has a learning disability? Reading. doing math, and writing letters may be difficult for lots of kids at first. But when those early troubles don't fade away (逐渐消失) after they have grown up, and they can't deal with (处理) them and to make any progress, it's possible the kid has a learning disability.
Finding out you have a learning disability can be sad. You might feel different from everyone else. But the fact is that learning disabilities are pretty common. And if you have a learning disability, you can start getting the help you need to do better in school. But to make this special help really work, you'll need to practice the new learning skills. It may take a lot of practice every day. That can be a challenge (挑战), but you can do it. Soon, you'll make progress and enjoy the results of all your hard work: more fun and success at school.