Boston Latin School Association | 1,923 followers on LinkedIn. Supporting America's 1st Public School, Boston Latin School (est. 1635) | The Boston Latin School Association (BLSA), founded in 1844, is an independent 501(c)(3) non-profit organization that exists to support the oldest public school in the United States, Boston Latin School. The BLSA organizes alumni linking activities such as reunions and social/networking events across the country. It also publishes The Bulletin, an annual print magazine, as well as companion electronic communications.