(In case anyone googles up this old thread - too old for me to edit my post above.)
I now disrecommend Mangahigh, unless you specifically want video-type games. The useful interface for picking a topic and practising it with increasingly hard questions on that topic is no longer available. (Children still get set topics from it by the system, but in our experience this is useless - they've never assigned a topic DS hadn't mastered at least 2 years ago, despite the system having current level information at sign-up and supposedly involving human judgement.) I emailed them about this and was told it was a mistake that it ever had been - only their tutors were supposed to have access to it. Really silly: they had a good product, and then decided to make it worse.
