All that we know is an artificial pupil teacher ratio which simply divides all Equivalent Full Time (EFT) teaching staff (including non teaching principals, Assistant Principals, welfare officers, psychologists, special educators, librarians, ESL specialists etc.) into the total number of students.
Great Haiku Deck by one of the masters. Some great pieces of info contained that I know I have shared with my students at one time or another. Great to see it all wrapped up into a nice presentation.
This is one of the most powerful projects I have come across in a long time. As I ponder a job change this could be something that I use in my classroom.