The National Sorority of Phi Delta Kappa, Inc. (NSPDK) is a nonprofit, educational sorority founded by eight educators desiring to establish a sisterhood among teachers and promote the highest ideals of the teaching profession. NSPDK was the idea of Gladys Merritt Ross, who, on Good Friday, March 30, 1923, convened a group of young teach­ers from Jersey City Normal School in Jersey City, New Jersey to discuss the idea of forming a sorority.