 Construction of Rancho Alamitos High School began in 1956.Rancho Alamitos High School was formulated for classes to start in the Fall of 1957; however, since the campus was not ready, their classes were taught for that first semester on the older Garden Grove High School campus.Although construction of the new campus was incomplete, in the Spring of 1957 the first classes at the Rancho Alamitos High School campus were held in two pre-existing homes on the property, ones that faced Dale Street.