The BISD 21st Century Program held its Third Annual Girls’ Symposium on Saturday, May 16 at the Central Administrative Building (CAB).  This year’s theme was Physics Circus and the girls learned about properties of matter, energy, force and motion.  The participants and their mothers listened to several guest speakers including Dr. Zendejas, Interim Superintendent; Minerva Peña, Board President; Dr. Joey Key, UTB Physics Professor; and Rebekah Rodriguez, a former Porter graduate.