One thing that went well: I busted out a grid activity at a good time in our really exhausting grammar lesson.
One thing to improve: There were so many incredibly picky questions, and most of them were not actually on the topic of our grammar lesson, which was Past Continuous (i.e. Grammar was driving us crazy.). Transitive and intransitive verbs came up in one of our examples and there went 20 minutes (The chicken was roasting. vs. I was roasting the chicken.). I did manage to avoid slipping into an impromptu lesson on Active and Passive Voice (I prepared the chicken. vs. The chicken was prepared by me.), but only because I’ve been revving up to dive into it in our next unit. But anyway… grammar basically engulfed the whole class period. And this was after I refused to answer half their questions (the Passive Voice ones). How harshly should I reign things in?
One surprise: How easy Past Continuous (you know, our official grammar point of the day) was compared to all the questions they were asking.