How will participating in the PACE Challenge Units help prepare me for the PACE exam? One way to get an idea of the kinds of questions and subject matter that are on the exam is to do the PACE Challenge Units in each of your classes.  They are completely optional and ungraded, but you get lots of feedback - especially on the judgment/analysis exercises.   The PACE Challenge Units will probably add an hour or so to the time it takes you to do the work in your regular class.