The California State Teachers' Retirement System (CSTRS) is a public pension fund that provides retirement benefits to teachers and educators in the state of California. Established in 1913, it serves over 900,000 members, including active teachers, retirees, and their beneficiaries. CSTRS is funded through contributions from both employees and employers, as well as investment earnings. CSTRS aims to ensure financial security for its members during retirement. The system offers various benefits, including monthly pensions, disability benefits, and survivor benefits. It plays a crucial role in supporting the financial well-being of California's educators throughout their retirement years.