I also like the idea of changing /rearranging the classroom but not early in the course, as I have found that the first 2/3 days if the students sit in thier assigned seats, you can very easily remember thier names,this is my way of knowing my students by thier names in the first week of class,it gives me a visual sense of memorizing the names as I go about in the classroom,this has helped me a lot, second week around ,the classroom is rearranged,and this is weekly routine.