And I have the same issue as Peterson, having a hard time to remember students names. But if there is no law forcing me do so whole pronouns story doesn't make much difference. I can't remember names of 90% of students (well ok, people), but now in addition to that I won't be able to remember their pronouns. In most cases names I remember are students who perform well in class or ask a lot of questions. If student makes those efforts in class, I will make an effort to remember names, nicknames, pronouns etc. I feel it is feir enough.