How does Carol change over the course of the play, Oleanna?

Carol's character undergoes a stark change as the play progresses. In Act One, she is portrayed as a confused, depressed schoolgirl who only wants to do well in John's class. By the end of the play, Carol is a manipulative, intelligent woman pursuing a strongly developed political agenda. Based on the text alone, it's impossible to say whether Carol is a mature manipulator who assumes the role of a naïve schoolgirl to advance her political agenda, or if she is truly a naïve schoolgirl swept up in the political agenda of an external force. Regardless of her motivations, Carol embarks on a political journey to advance the agenda of political correctness at the cost of John's livelihood.