School Formula Off Kilter
"Designed to equalize educational opportunity from place to place, Oregon's school funding formula in some cases delivers too much money and in others too little to meet students' educational needs, according to the state's first in-depth look at the formula."
This is an interesting article about the balance of funding, but there was a little statement jumped off the page.
"Oregon has 21 schools with fewer than 25 students, and in those schools, the average pupil-teacher ratio is nine students per teacher, compared with 22 students per teacher in Oregon's largest schools, the study says."
This was a study commissioned by the state legislature, and the study itself names the teacher to student ratio as "22 students per teacher in Oregon's largest schools."