Ender's Shadow: Battle School #4

Bean has traded the streets of Rotterdam for an environment that seems even more challenging-Battle School! For the orphan named Bean, Battle School is a continuation of the war for survival that began on the streets of Rotterdam. But there's another war he's being trained to fight - against the alien race known as the Formics. And he now knows that the training includes some blatant lies about both the enemy and the campaign...