Teachers' Retirement System of the State of Illinois, also known as TRS, is responsible for providing retirement, disability and survivor benefits for its members. The system has been in operation since 1939. It offers various public pension plans for public school teachers and administrators in Illinois. Teachers' Retirement System of the State of Illinois offers services for more than 355,500 individuals. The system provides online member guides, brochures, information bulletins and other documents covering a variety of topics of interest. In addition, it offers information on benefits, legislation, fund activities and policy changes. It also provides online account access options.