Chandralekha Singh, Distinguished Professor of Physics and Director of the Discipline-Based Science Education Research Center (dB-SERC), was invited to present at the International Union of Pure and Applied Physics (IUPAP) Centennial Symposium at the Abdus Salam International Centre for Theoretical Physics (ICTP) in Trieste, Italy in two different sessions that focused on Physics Education for the 21st Century and Diversity, Equity and Inclusion in Physics. The mission of IUPAP that celebrated its 100^th birthday at the Centennial Symposium in Trieste is to assist in the worldwide development of physics and foster international cooperation in physics.