Kids with ADD are just as smart as any other kids. Many kids have trouble sitting still, paying attention to their work, or being patient and waiting their turn.
Some kids get bored quickly and talk too much in class.
Some kids need help from teachers, parents, or a counselor to learn how to improve in those things. It's not a big deal to have ADD, but it is important that kids get the help they need. Some kids with ADD have a hard time sitting still or staying in their seat. This is called feeling restless or hyper. Many kids with ADD get bored way too easy, and they have a hard time paying attention to the work they're supposed to be doing in class.