I have uncovered three certificates relative to the schooling of my grandfather, and I am in hopes that there is someone familiar enough with the system at that time to expand on other than the obvious. All three of the certificates are issued by the University of the State of New York, with information certified by the "Principal of Phoenix Union School". The first, issued in Jun 1893 (when he was 16) says that he completed the examinations required for admission to academic standing (subjcts listed), and was now an "Academic Student". The second was issued in March 1895, says that he completed examinations for some stated subjects, and was now a "Junior Academic Student". The third was issued in June of 1895 (same year as above) and is called a "30 Count Certificate". It says that he attained 75% on a list of 13 subjects that were not crossed off of a list of 55. I assume that all of this means he was what we would call a high school graduate today?