Final answer:
The individual named Pender's specific school in Oak Park, Illinois, is not identifiable without more context. Oak Park and River Forest High School is a prominent school in the area. For historical figures, biographies or historical records could provide the necessary information.
Step-by-step explanation:
The question appears to refer to a specific individual by the name of Pender, and their enrollment in a school located in Oak Park, Illinois. Oak Park is known for its educational institutions, one of which is Oak Park and River Forest High School, known for its academic excellence.
However, without additional context or identification of 'Pender,' it is not possible to provide a definitive answer. Oak Park has multiple schools, both public and private, and without the full name or the time period, pinpointing the exact school 'Pender' entered is speculative.
Typically, when looking into historical figures or people of note, one might consult biographies, historical records, or databases that contain educational histories. If 'Pender' is related to a particular event or is a figure studied in history classes, the school they attended might be recorded in such resources.