sentences:  The school, led by Lucia Morse, was launched as the Kindergarten Extension Association School in 1912.In 1916, the Cottage School was closed and a first grade program was launched at the Downers Grove kindergarten, which was renamed the Junior Elementary School.To accommodate older students, a second grade class was added in 1920 for students around seven years old, a third grade in 1926 for eight-year-olds, and a fourth grade for nine-year-old students shortly thereafter.