The three school buildings in the newly established district were renamed through a student competition in 1906. The names selected were Arlington School (formerly District #25 and Central School), Liberty School (formerly District #24 and Winchester School), and Pioneer School, located near 300 West and 5300 South. By 1911, Bonnyview and Hillcrest Schools had been built. Development of a high-school curriculum began in the 1913-14 school year, at the Hillcrest School. A new grade level was added each year until diplomas were awarded in May 1917, to the first five high-school graduates. Kindergarten was permanently instituted in the 1920s.