From Palo Alto Wiki
Castilleja School is a private college preparatory school for girls located in Palo Alto. "Casti", as it is nicknamed, has roughly 485 students in grades 6 through 12.
The student to teacher ratio is 8:1, and one hundred percent of Castilleja graduates go on to attend a four-year college or university, with a significant number typically matriculating to Stanford. Castilleja has been a member of the California Association of Independent Schools since 1942.
The Castilleja Mascot is an Alligator (the Casti Gators).
The school was founded in 1907 by Ms. Mary Ishbel Lockey at the urging of the first President of Stanford University, Dr. David Starr Jordan. Miss Lockey herself was a Stanford alumna, and Dr. Jordan convinced her of the immediate need for a college preparatory school for young women in the Bay Area.
The school started with 14 teachers and 68 students, many of whom were boys. Seven resided at the school. Three years later, Lockey purchased the land upon which Castilleja currently stands.
Miss Lockey passed away in 1939, after having funded a number of students during the Great Depression. She had never recovered from her financial hardship, and the school was bankrupt by 1941.
Miss Margarita Espinosa, a Castilleja alumni, became principal in January, 1941. The combination of faculty consenting to working without salary for the rest of the year and parents donating money, allowed the school to stay open. In 1942, the school was incorporated as a nonprofit institution under a Board of Trustees.