Like any instructor, I am nervous about meeting the new students in my class, however, the first day of class does not necessarily mean that the first impression is the one that will predominate the rest of the semester. I have had semesters that started out good but somewhere along the way the student dynamic changed and by the end of the semester I was glad that class was over. And the reverse can be true. It is interesting how the student dynamic changes. You may start off with expecting a particular student(s) to do very well only to see them drop off the radar before the semester is over, only to find a student(s) that kind of "hid" in the background early on becomes the "unsung hero."