The thread about preferred subs made me curious about how teachers know when one sub is excellent while others are so-so. Obviously, teachers are generally not in the room at the same time as a sub. I can imagine it's clear when a sub is awful and none of the plans are followed, there's no note, or something similar. It's the other times that I'm wondering about. For example, I was in a classroom recently where I had the chance to observe and help out when a sub was in the room. I thought she was great! Good control over the classroom, followed the plans and supplemented when there was extra time, fair with the kids, etc. When the teacher came back, the kids said she was mean and the teacher didn't seem to get any more input than that. She wasn't mean, just stricter than they were used to. I visited that class regularly, so I knew how the room ran on a daily basis. How does a teacher know who is a great sub that might end up on their preferred list? My own experience in this area is limited to special education, where there are always number of adults in the room. That isn't really the case in gen ed classes. Hopefully this can satisfy my curiosity while helping out some of the folks on this forum who work as subs.