Many instructors believe that an informal, relaxed classroom environment is conducive to learning and innovation. It is not uncommon for students to【51】easygoing and friendly relationships with their professors. The casual professor is not necessarily a poor【52】and is still【53】by students.【54】students may be in a subordinate position, some professors treat them as【55】【56】, no matter how egalitarian professors would like to be, they【57】are in a position of authority. Professors may establish social【58】with students outside of the classroom,【59】in the classroom they maintain the instructor's role. A professor may have coffee one day with students but the【60】day expect them to meet a deadline for the submission of a paper or to be prepared for a discussion or an exam. The professor may give extra attention outside of class to a student in need of help but probably will not treat him or her differently when it【61】to evaluating school work. Professors have several roles in relation【62】students; they may be counselors and friends as【63】as teachers. Students .must realize that when a teacher's【64】changes, they must appropriately【65】their behavior. and attitudes. Many teachers believe that the responsibility for learning lies【66】the student. If a long reading assignment is given, instructors expect students to be familiar with the information in the reading even if they do not discuss it in class or give an examination. (Courses are not【67】merely for students to pass exams, ) The ideal student is considered to be one【68】is motivated to learn for the sake of learning, not the one interested only in getting high grades. Grade-conscious students may be frustrated with teachers who do not believe it is necessary to grade every assignment. Sometimes homework is returned with brief written【69】but without a grade. Even if a【70】is not given, the student is responsible for learning the material assigned. (51)