I'm not dissing repetition as a method to facilitate memory.
In WoW, people repeat the same boss over and over without learning anything or changing the approach until through luck they win. This is not possible with a school exam because you only get one chance, and even in the event that you can repeat it, the exam will be changed.
Actually the WoW approach has more to do with a different form of learning -- variable interval reinforcement ratios -- which has been canvassed at HN before.
In WoW, people repeat the same boss over and over without learning anything or changing the approach until through luck they win. This is not possible with a school exam because you only get one chance, and even in the event that you can repeat it, the exam will be changed.
Not so in videogames.