Do the candidates make predictions about the training program that awaits Ender and the other boys upon their arrival at Battle School?
Part of the intrigue of this novel is the paucity of information available to the Battle School candidates before they are chosen; the parents, in particular, are in the dark about what is about to happen to their children, and they certainly don’t realize that they will probably never see their children again, as in Ender’s case. The reader has no expectations different from earth-bound worlds, and make no unusual predictions--while the term “military school” would give the modern reader some idea of the training – rigorous physical discipline, unquestioned obedience to authority, weapons training, etc. – whether these 9-10 year-old children had any such expectations is only lightly touched on. In fact, to some degree the training regimen is invented and revised in each session, so the reader gets the impression that even Colonel Graff and his staff are inventing scenarios and tests as they go. The sessions in the Battle Rooms have no parallel in earthly experience, since they are in zero-gravity, and use paralyzing weapons whole paralysis wears off quickly. Finally, it is problematic to even consider whether children this young know enough about life to even speculate on what’s in store in the future.
Classes include creative thinking, as in the giant's drink solution, battlestrategies, as in the Battle Rooms, and leadership, as in the Dragon chapter. And, not exactly a "class," he is learning how to control his violence (as with Bonzo). Not sure what you mean by "5 line."