My 10 year old homeschooled son tends to learn like this with one to three subjects at a time. He is not satisfied with just reading a book about the subject he is interested in. He always has to look up more info on Wikipedia or other sources as he is reading and he wants to stop and discuss what he is learning. Even that is not enough for him. He almost always finds educational videos online on his own to go along with whatever he is studying. For example, when he was studying U.S. government he found "Electing A U.S. President in Plain English" and he liked the way the information was presented. When he is through learning a subject this way he usually seems to have a better understanding of the subject than I do.
