We love the Flashmaster. The Flashmaster is a hand held computer that drills your student in addition, subtraction, multiplication, and division facts. My son loves it. If you have a child who has trouble getting the facts to stick, this is a great option for daily review. The Flashmaster has several settings to review your math facts. If you would like more information the web site does a nice job explaining how it works. The advantage of the Flashmaster is you can take it with you, and would be a great item to have in a waiting room. It is pricey, but I think it is worth the money. I am guessing you could probably resell when you are finished.