Its not that they think it'll be easy. They did assume that there would be BASIC decorum though. For sure the true state of the public school system is an eye opener. One one hand you have a professional eager to teach and on the other a few kids that make sure no teaching or learning will take place sanctioned by the administration.
A few years ago, one of the best schools money could buy was opened in a less-than-desirable urban neighborhood. It was new, clean, high tech and state of the art. It had the best teachers money could buy. Within a few short years it became run down and the maint staff either tired of fixing graffiti and vandalism or just plain gave up. The best teachers fled for other environs. Young gangsters and wannabe's disrupted education for those who did want an education. Many students just didn't see education as important to them and had parents who obviously agreed with them.
The result? The politicians screamed the school was failing and could only be saved with more money.