"Launch"

Graff and another unknown man, most likely the person he was talking to in the beginning of the first two chapters, decide that Ender must be isolated to being out the best of his abilities. On the shuttle, Ender is basically out casted, with the other children playing, while he's alone, nervous and silent. While they go into space, Ender orients himself in different ways, saying he's walking down the walls, etc. Graff insults the other kids for not realizing this, and praises Ender for noticing that. A kid sitting behind Ender picks on him, then Ender throws the boy out of his seat and breaks his arm from hitting the wall, because of zero gravity. Ender again feels like Peter, and feels sick from it. Graff isolates him even more by telling the other kids not to mess with Ender. After arriving at the school, Graff talks to a teacher named Anderson, and says Ender is the one, and will be made into the best commander in military history. 

While reading, I saw that the chapter showed Ender's superiority compared to the other students. He sees through Graff's plan, seeing Graff as someone to use him. I think it even supports the foreshadowing of him being manipulated, because he's already being isolated, like Graff wanted. Graff is becoming more and more satisfied by Ender, by all of his actions and words.