Chapter 3.4 was much, much easier for people. Many people got 100% on their first tries, and those who didn’t usually got 100% on their second try.
The things that people struggled with were usually the fact that the imperative can means something other than a command, and where to put pronouns when it wasn’t an imperative phrase – basically a hang-over from the previous lesson.
These last two lessons didn’t have completed quizzes, which is probably another reason that people struggled with them. I need to get on the ball and make more of those.