Sigma Sigma Sigma (), also known as Tri Sigma, is a national American women's sorority. Sigma Sigma Sigma is a member of the National Panhellenic Conference (NPC), an umbrella organization encompassing 26 national sororities or women's fraternities, which focus on service, education, scholarship programming and social activities. Once a sorority exclusively for teacher's/educational colleges, Tri Sigma became a full NPC member in 1951 and, as a social sorority, now admits members without limits based on major. The sorority counts a membership of more than 136,000 women, hosts chapters on more than 100 college campuses, and maintains over 90 alumnae chapters. The sorority's own headquarters are located in Woodstock, Virginia. History The State Female Normal School in Farmville, Virginia (now known as Longwood University) was the state's first institution to open its doors to teacher education. Eight students, Margaret Batten, Louise Davis, Martha Trent Featherston, Isabella Merrick, Sallie Michie, Lelia Scott, Elizabeth Watkins, and Lucy Wright founded the sorority in 1898. Scott and Wright led the first meetings of their secret society, the S.S.S. Club, in 1897. On April 20, 1898, these women officially announced the founding of the Greek letter society known as Sigma Sigma Sigma. At the same time, Lucy Wright's roommate, Julia Tyler, was working to found Kappa Delta sorority. In the fall of 1898, Zeta Tau Alpha was founded, followed by the founding of Alpha Sigma Alpha in 1901. These four sororities were all founded at the State Female Normal School and were henceforth referred to as the "Farmville Four". In its first decade, Tri Sigma recognized the need for both legal recognition as a social body and a written record of organization. Therefore, they filed documents with the Commonwealth of Virginia and received their Charter of Incorporation on February 12, 1903. Tri Sigma's first constitution was adopted by its first chapter, the Alpha chapter, in April 1903. In the first decade since the sorority's inception, the founders took steps to lay the groundwork of the sorority's foundation, including joining the Association of Education Sororities. In 1915, Tri Sigma absorbed the two remaining chapters of Sigma Delta Chi sorority. Additional collegiate chapters were established and all members met at a convention. As the sorority grew, the national nature of Tri Sigma solidified with the standardization of a ceremony for new members and the establishment of a Founder's Day to celebrate the founding of Sigma Sigma Sigma. Tri