That is, players think they are only learning the rules, or mechanics, of a video game.

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Rather than just learning a particular set of rules or a formula in a lecture, simulations let managers try things out.

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China, wisely learning from the West and elsewhere, has eased for trading and investment rules and opened its exchanges wider to entrepreneurs.

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Dragonbox is impressive because, without relying on text, it teaches the rules of algebra step-by-step as if the player is really only learning the laws of the universe particular to the game.

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"Just insisting on rules and regulations is no fun at all and can put a lot of children off learning all together".

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