For the first day of class I try and dress professionally, but I don't like to look too intimidating. Most students are nervous enough during the first day of class, they don't need to see a big scary instructor in front of them too.
During the first day of class I share something about myself and then ask each student to share something too. I usually do an icebreaker before diving into the workings of the course. This helps to introduce students to each other and see who they can relate to.
