with 126 girls. In 1930, the current building on Jerome Avenue and West 195th Street was constructed as Walton's new home, using the same structural design as Abraham Lincoln High School and Samuel J. Tilden High School, both in Brooklyn. The school moved to its new home in 1932. Conlon continued as principal until her death in 1936, when Marion Cahil Heffernan (an assistant principal of economics at Erasmus Hall High School in Brooklyn) took over. By 1933, the student population had peaked at approximately 6,000. It was noted as the second-largest high school in the world behind its brother school, DeWitt Clinton. It was also noted that it was the largest high school in the world for girls. Walton was a prestigious all-girl institution throughout much of its history, with a high graduation rate. Its students were often inducted into the Arista honor society. Many of Walton's graduates went on to Ivy League colleges and universities. For many years the school's yearbook was named the Periwinkle, a small blue flower. With the change in demographics of the surrounding neighborhoods came the change in the overall level of excellence for which Walton had been known. The demise and eventual closing of this school saddened those who remembered Walton as it was. In 1966, Mrs. Heffernan retired after serving thirty years as principal. The school appointed its first male principal, Daniel Feins, the former assistant principal of social studies at Christopher Columbus High School. Walton continued as an all-girl school until 1976, when the administration elected to become a co-educational high school. On September 9, 1977, boys were officially admitted to the school; however, it wouldn't be fully co-educational until 1979, when the final all-girl class graduated. In 1980, Marjorie Kipp was appointed as the new principal, and three years later, the school's pool was closed due to a deterioration from the skylight. In 1984, Phyllis Opochinsky founded the "Pre-Teaching Academy" (students work with other peers with classwork and homework, assist teachers in classrooms, write term papers on their experience in pre-teaching, and earn college credit through Lehman College). In 1986, Angel D. Orengo became the first male to have the school's valedictorian honor. In 1990, Kipp retired and a new principal, Mrs. Nicola Genco (an assistant principal of guidance at Alfred E. Smith High School) was appointed. During her tenure she addressed security issues, employed more than twenty school safety