An expert talk session was organised on International Pi Day on 14th March, 2023. The session was conducted by PCER Chembur alumni Mr. Gyanendra Pratap Singh. Mr. Gyanendra is the Head of Departments of Mathematics, Dr. Pillai Global Academy, New Panvel. The theme for this year’s International Pi Day was ‘Mathematics is Everywhere’. Mr. Gyanendra Pratap Singh described the history and origin of the p (Pi). He explained about the concepts related to pi like the irrational and infinite numbers. He also discussed the contribution of various scientists like Archimedes, Aryabhatta, Sir Isaac Newton and discussed their research work. The session was very interactive and encouraged student teachers to learn about mathematics and promote math education.