I felt the "uneasy" feeling when I was reading that I should know all my student's names by week two. Wow. I teach 3-4 classes with about 20 students per class and each class lasts 5 weeks. That is a great deal of names by week 2! I usually have most of them learned by week two , but sometimes it is week three. I now know that I will have to put a little more effort forth in learning names by week 2 because I certainly do understand the importance of that concept.