STEP 1: Parent sends letter to the building principal that you plan to opt out. SAMPLE LETTER: Dear Principal,.This document describes the process of opting out of PSSAs and Keystone exams. It was provided to ALL principals in the Philadelphia School District. Parents can opt their children out of PSSA, PASA, and Keystone tests. You can read more about our general position and history on opting out of tests here. Students who do not participate due to a religious opt-out count negatively against the school's participation rate in school accountability reporting. How to Opt Out of the PSSA's. A sample form letter is included at the end of this document. Need an opt out letter template?