If your class is willing to open up, the first weeks of the semester might be a good time to have a question-and-answer session regarding their concerns. Many students are probably beginning to have questions and fears about life in college. You might have better luck if you invite the students to write their questions, fears, or concerns on an index card. Make sure you let them know that they are not required to identify themselves. Collect all of the cards and answer accordingly. Consider creating an FAQ sheet that responds to all the anonymous questions and passing it out to students during the next class or e-mailing or posting it to a course Web site. Chances are that if one student has the concern, there is at least one more student in the class with the same concern.