On April 10, 1906, the Arizona Board of Regents resolved that as of September 1, 1906, students from all Arizona cities, having a population of more than 5,000, must have completed the 9th grade before enrolling in the University of Arizona Preparatory Department.
The Arizona Board of Regents made a decision on April 10, 1906, that as of September 1, 1906, students from larger cities in Arizona would need to finish their 9th grade before being accepted into the University of Arizona's preparatory program for residents from urban areas.