This is very different from learning about their skill deficiencies during orientation week, from signing up for a specialized subject test that's not required for admission, or from running a statistical analysis (what's that, anyway? they'll think) of your PSAT score.
They don't need to "run a statistical analysis" to use the AP Potential site I mentioned, but they will need to understand a statement such as "students in your score range have an X% chance of achieving Y." They will need to understand such a statement regardless of the test given, if they are to be guided by a test score.
