I have worked with other teachers that would never admit they made a mistake. It was very frustrating. In my own experience I was doing a problem at the end of the period and it did not work so I said I will check on it and give you the correct procedure next period. I really got zapped on my evaluation for just that one time. I am not sure about how willing I am to admit a doubt.

The point about giving students recognition every class meeting is ver important. Students who miss class do not get that and often return to class and feel isolated and out of touch with the class. They have missed instruction and need to get back in the flow. I believe that in my classes this is the reason I lose students.