Student's Behavior Affects Teacher's Academic Evaluation Of Student

From "Poor behavior doesn’t always lead to poor academics" on ScienceBlog:

Researchers from the University of North Carolina – Charlotte (Bob Algozzine, Chuang Wang and Amy Violette) followed 350 students in seven at-risk schools over a 5-year period. They assessed both teacher perceptions of student behavior and academic achievement, as well as actual performance. They found that teachers were more likely to report that well-behaved students did better academically and expected more of them – even when some of these students were struggling with school-work. At the same time, students who acted out in school were seen as having more academic difficulties, even though this was not always the case.