Setting High expectations for students lets them know that this important and interesting. Being clear about what you are asking them to do directs their actions. Students coming to higher education at a community college vary enormously in background, recent academic experience and motivation for learning the subject. Expectations can be presented and reinforced through evaluation, communication, and modeling.
Research has shown that a teacher’s expectations have a powerful effect on a student’s performance. If you act as though you expect your students to be motivated, hardworking, and interested in the course, they are more likely to be so.
Set realistic expectations for students when you make assignments, give presentations, conduct discussions, and grade examinations. “Realistic” in this context means that your standards are high enough to motivate students to do their best work but not so high that students will inevitably be frustrated in trying to meet those expectations. To develop the drive to achieve, students need to believe that achievement is possible -which means that you need to provide early opportunities for success.
–from Motivating Students
http://honolulu.hawaii.edu/intranet/committees/FacDevCom/guidebk/teachtip/motiv.htm
Grading Rubrics
Rubrics or explicit descriptions of grading criteria help students determine what is expected of them for a particular assignment, and can determine if they have adequately fulfilled the requirements. Rubrics take the guess work out of the assignment definition and grading process. Publishing the rubric along with the assignment helps set expectations.