As a public school ESL instructor in South Korea, I know that my requirements and authority level are limited in comparison to my Korean counterpart, or co-teacher. Still, in my situation where I teach half the classes and my co-teacher the other, I’m still bearing the full weight of what happens during each 40 minute session. That is, I’m not just responsible for covering the material but also maintaining my sanity based on how smoothly the classes run.
Noone is really concerned whether or not your classes are organized and streamlined. The co-teacher cares some, but that’s usually because it has a bearing on how much involvement will be required of them. Other than that, noone from the Department of Education is concerned, no principle or vice-principal is taking note, etc. It’s up to you (and me) to ensure that our classroom management skills are effective and put in place. For our own sake.