Two major projects were undertaken during the 1990s. Due to changes in IHSA rules, Princeton needed a new all-weather track to replace the old cinder track. The auditorium had also fallen into disrepair and needed to be renovated. An all weather track was completed on Bryant Field and was dedicated as the Frank and Marion Rathje Track in 1997 for their generous contributions to the effort. Mr. Rathje was a banker in the Chicago area like his father, Frank C. Rathje. The Princeton High School Foundation raised over 1 million dollars to renovate the auditorium. The new Sally Skinner Council Auditorium was dedicated in November 1999. Both projects were majorly funded by members of the community. In 2003 several classrooms were renovated. In the fall of 2004, Princeton High School began what turned into a somewhat controversial new addition to the school.