Learning never stops, no matter how old you get or what you already know.
I’ve recently been concentrating on learning internet marketing, something that I studied very intently when I first became a website owner. I’ve found out that covering the same material I covered 18 months ago still taught me new things and reinforced things I already knew.
It’s kind of like when you re-read a favorite book, or see a movie for the second or third time. You always notice new things and get greater insights.
Learning can always be that way, no matter who you are or what you’re learning.
Maybe this is a technique you can use with your ADD child for things that are especially hard to grasp. Let them study it once, and then re-visit it a day or two later to see if you can add to, or reinforce what has already been learned.