Rote learning of "math facts" is one of the really dull aspects of grade-school mathematics. But if you can't recall them quickly, it can really hold you back even in higher mathematical disciplines, because it just slows you down. My son's been struggling with this for some time now, with traditional solutions like flash cards just not working very well. With "Tux of Math Command", otherwise known as "TuxMath", though, he's making considerable progress at overcoming his "wall" with math. Homework times are getting shorter because his recall speed is getting much better with just one or two games a day -- an easy goal to reach because the games are actually fun (Seriously. I play it myself now and then).