How do you recover from apparent disaster? First, I recognized that some of this was generated by me. Usually an across the board problem is evident of a teaching problem. And throwing standard integrals in combination with u-substitution integrals can cause some headaches, especially for amateurs. It was classic overthinking, lots of students trying to make substitutions that weren't there. I didn't yell or anything. Current class grades were posted and I just put on the serious face and said "you be quiet for a minute."
We reviewed the test, they sighed at how easy it all was. I made a peace offering and held a retake on the skills portion the following Wednesday. This is actually not different than my normal policy. Skills portions are always eligible for retake. The only qualifier is that you had to have done the previously two homeworks. As noted last week, a lot of kids couldn't be bothered.
Normally the day prior to the test I'll put some bullet points up for study purposes. This week I tried to make a point:
I'm cautiously optimistic that the message was clear. You never know.
They were also given a series of assignments to do in the class days that followed. I grouped them together as a project grade that took the place of their normal mock AP exam (which is happening later so we can cover more).
Deep breaths and time.